feat: add v2 production release workflows

[cs-raj]

Summary

Ports production release workflows from the development branch to v2-dev for CLI v2 GA. These sit alongside the existing beta workflows — beta releases via v2-beta continue to work unchanged.

New files

File	Purpose
release-production-pipeline.yml	Orchestrator — triggers on push to main + workflow_dispatch, calls the two sub-workflows
release-production-core.yml	Publishes @contentstack/cli with tag: latest, creates a non-prerelease GitHub release
release-production-platform-plugins.yml	Publishes utilities / command / config / auth with tag: latest

Also

• Added .talismanrc exception for secrets: inherit in the pipeline workflow (false positive — it's a GitHub Actions keyword, not a secret)

Test plan

• Verify all three files are present on v2-dev
• Verify release-production-pipeline.yml triggers on main with workflow_dispatch available
• Verify release-production-core.yml uses tag: latest and creates a non-prerelease GitHub release
• Verify existing beta workflows (release.yml, release-v2-beta-*.yml) are untouched
• After v2 GA merge to main, confirm the pipeline fires end-to-end

Related

• Epic: DX-10156 — CLI v2 Post-Release Stabilization
• Companion PR: contentstack/cli-plugins#TBD

🤖 Generated with Claude Code

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

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[github-actions]

🔒 Security Scan Results

ℹ️ Note: Only vulnerabilities with available fixes (upgrades or patches) are counted toward thresholds.

Check Type	Count (with fixes)	Without fixes	Threshold	Result
🔴 Critical Severity	0	0	10	✅ Passed
🟠 High Severity	0	0	25	✅ Passed
🟡 Medium Severity	0	2	500	✅ Passed
🔵 Low Severity	0	0	1000	✅ Passed

⏱️ SLA Breach Summary

✅ No SLA breaches detected. All vulnerabilities are within acceptable time thresholds.

Severity	Breaches (with fixes)	Breaches (no fixes)	SLA Threshold (with/no fixes)	Status
🔴 Critical	0	0	15 / 30 days	✅ Passed
🟠 High	0	0	30 / 120 days	✅ Passed
🟡 Medium	0	0	90 / 365 days	✅ Passed
🔵 Low	0	0	180 / 365 days	✅ Passed

ℹ️ Vulnerabilities Without Available Fixes (Informational Only)

The following vulnerabilities were detected but do not have fixes available (no upgrade or patch). These are excluded from failure thresholds:

• Critical without fixes: 0
• High without fixes: 0
• Medium without fixes: 2
• Low without fixes: 0

✅ BUILD PASSED - All security checks passed