[v3-2-test] Fix SecretCache import failure on Python 3.14 multiproces…

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

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Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

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• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.

[potiuk]

…sing (#64501)

The conf object in airflow.sdk.configuration is lazily initialized via __getattr__. Importing it at module level in cache.py causes ImportError when the module is deserialized in a multiprocessing child process on Python 3.14. Moving the import into SecretCache.init() where it's actually used avoids this issue.
(cherry picked from commit 7438cbf)

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

---

• Read the Pull Request Guidelines for more information. Note: commit author/co-author name and email in commits become permanently public when merged.
• For fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
• When adding dependency, check compliance with the ASF 3rd Party License Policy.
• For significant user-facing changes create newsfragment: {pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.