fix(webapp): stop logging every environment on a lookup miss

[carderne]

Summary

When an environment lookup misses, the diagnostic log now records the requested slug and the number of environments checked instead of serializing the full environment collection.

[changeset-bot]

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Latest commit: 264bd60

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[coderabbitai]

Walkthrough

Updated environment-not-found logging in the organizations presenter to include the number of available environments. No control flow or returned data changed.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is only a summary and omits the required issue, checklist, testing, changelog, and screenshots sections.	Add the template sections: Closes #, checklist, testing steps, changelog, and screenshots or mark them N/A.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title is concise and accurately describes the lookup-miss logging change.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sec-406

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.