Bump OpenFGA to v1.18.2

[JohnRDOrazio]

Local dev stack only. Image pin bump for both openfga and openfga-migrate (v1.15.1 → v1.18.2). No other pinned image touched; the Playground+preshared-auth comment at lines ~150-154 stays accurate (re-verified against 1.18.2, still panics).

Migration-free on Postgres: the Postgres migration set is identical (001-006) at both tags, and the v1.18.0 MySQL lock warning does not apply here.

Verification (in place, against the existing local dev volume — not a fresh one)

• openfga-migrate v1.18.2 run against the database this stack already migrated with v1.15.1: reports current version: 6 and applies nothing (exit 0).
• openfga v1.18.2 reaches healthy via the existing /usr/local/bin/grpc_health_probe healthcheck — unchanged from v1.15.1.
• Store/model/tuple state compared before and after the bump: exactly one Martyrology store (01KZ63MBF6M9A08XQD6QR8PR81), the same authorization model (01KZ63MBFTEC5TFBM896WYEJHR), and the same 11 structural tuples (8 governed_by + 3 on_platform) — byte-identical, nothing re-seeded.
• The unrelated, already-running martyrology-frontend stack (separate compose project, its own OpenFGA instance) was confirmed undisturbed throughout: still 9 containers up, its API container still healthy and serving 200 on /docs.

No production access was used for this verification; everything above is local Docker only.

Summary by CodeRabbit

• Chores
  • Updated OpenFGA migration and runtime services to version v1.18.2 for improved compatibility and maintenance.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 7a85d452-322a-49ff-b12a-2ae15e2e5a6b

📥 Commits

Reviewing files that changed from the base of the PR and between 975ca2a and cf99903.

📒 Files selected for processing (1)

• docker-compose.yml

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📝 Walkthrough

Walkthrough

The Docker Compose configuration updates both OpenFGA services from image version v1.15.1 to v1.18.2.

Changes

OpenFGA image update

Layer / File(s)	Summary
Update OpenFGA service images docker-compose.yml	The migration and runtime services now use OpenFGA image v1.18.2.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the primary change: updating OpenFGA to version v1.18.2.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/openfga-1.18.2

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