chore: upgrade go-libs for multi-issuers support

[sylr]

Summary by CodeRabbit

• New Features

  • Added support for multiple authentication issuers, enabling the service to trust additional issuers beyond the base URL configuration.

• Chores

  • Updated authentication library dependency to the latest version for improved functionality and compatibility.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 424eb83 and bec00fe.

⛔ Files ignored due to path filters (1)

• go.sum is excluded by !**/*.sum

📒 Files selected for processing (2)

• cmd/serve.go
• go.mod

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📝 Walkthrough

Walkthrough

Authentication module refactored from single-issuer to multi-issuer JWT validation. Configuration changed from Issuer string to Issuers list. Provider decorator now returns authlib.Authenticator constructed via authlib.NewJWTAuth, aggregating per-issuer key sets instead of a static key set.

Changes

Cohort / File(s)	Summary
Multi-issuer Authentication Support cmd/serve.go	Updated authlib.ModuleConfig to accept multiple issuers ([]string) and modified fx.Decorate provider to construct per-issuer key sets and return authlib.Authenticator via NewJWTAuth instead of static oidclib.KeySet.
Dependency Update go.mod	Bumped github.com/formancehq/go-libs/v3 from v3.4.0 to v3.6.1.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 One issuer became two, then three, then more,
A rabbit's delight—no single door!
Per-issuer key sets now dance in a map,
NewJWTAuth grins, closing the gap. ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the primary change: upgrading go-libs dependency to enable multi-issuers support in the authentication module.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/upgrade-go-libs

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