test: MinIO integration tests for bucket provisioner + graceful degradation fixes

[pyramation]

Summary

Adds end-to-end integration tests for @constructive-io/bucket-provisioner that run against a real MinIO instance in CI. This complements the existing mocked unit tests (574 lines, 6 test files) with real S3 operations, following the same pattern established by s3-signer.integration.test.ts in the presigned URL plugin (PR #959).

Integration test cases covering:

• provision() for private, public, and temp bucket types
• inspect() to read back and verify all bucket configuration
• updateCors() to change CORS rules on existing buckets
• bucketExists() for existence checks
• Versioning, per-bucket CORS overrides, idempotent re-provisioning
• Error handling (BUCKET_NOT_FOUND)
• Full round-trip: provision → inspect → updateCors → re-inspect

Tests skip gracefully with a console warning when MinIO is not reachable (local dev without Docker), and run fully in CI where the minio_cdn service is available.

Production fix — graceful degradation for non-AWS providers

MinIO's free edge-cicd image does not implement several S3 APIs. Previously, these unsupported calls caused all provisioning to fail. Now all six methods gracefully skip errors when provider !== 's3':

Method	Unsupported API	Error before fix
setPublicAccessBlock()	PutPublicAccessBlock	POLICY_FAILED
setCors()	PutBucketCors	CORS_FAILED
setBucketPolicy()	PutBucketPolicy	POLICY_FAILED
deleteBucketPolicy()	DeleteBucketPolicy	POLICY_FAILED
enableVersioning()	PutBucketVersioning	VERSIONING_FAILED
setLifecycleRules()	PutBucketLifecycleConfiguration	LIFECYCLE_FAILED

AWS S3 provider still throws on errors (unchanged behavior).

Key distinction: provision() returns the intended configuration (e.g., corsRules populated, blockPublicAccess: true, versioning: true, lifecycleRules filled), while inspect() returns what MinIO actually supports (e.g., corsRules: [], blockPublicAccess: false, versioning: false, lifecycleRules: []). Integration test assertions are updated accordingly.

Unit test changes: Error propagation tests now explicitly use s3 provider, and a new test verifies MinIO provider skips PutPublicAccessBlock gracefully.

Updates since last revision

• Added graceful degradation for enableVersioning() (PutBucketVersioning → NotImplemented on MinIO) and setLifecycleRules() (PutBucketLifecycleConfiguration → MissingContentMD5 on MinIO).
• Updated integration test assertions: versioning inspect now expects false, lifecycle inspect now expects empty array, round-trip test no longer asserts versioning is applied on MinIO.
• Total graceful-skip methods increased from 4 → 6.

Review & Testing Checklist for Human

• provider !== 's3' catch-all scope (now 6 methods): The fix silently swallows errors for ALL non-AWS providers (MinIO, R2, DigitalOcean Spaces, etc) across six methods. If any non-AWS provider does support these APIs, legitimate errors would be hidden. Consider whether a more targeted check (e.g., specific error codes or provider allowlist) is safer.
• provision() return values are misleading for non-AWS providers: provision() returns versioning: true and populated lifecycleRules even when MinIO silently skipped those APIs. Consumers that trust provision() output without calling inspect() will believe features are active when they're not. Consider if provision() should indicate which features were actually applied.
• Real-world impact on MinIO deployments: Versioning and lifecycle rules will NOT be applied on MinIO (silently skipped). This means temp bucket auto-cleanup won't work on MinIO, and versioning protection is absent. Verify this is acceptable or document it prominently.
• Real-world CORS impact: MinIO deployments will NOT have bucket-level CORS configured (silently skipped). Browser-based uploads to MinIO could hit CORS errors. Verify this is acceptable for your MinIO use cases, or document that MinIO requires server-level CORS config.
• Skip mechanism doesn't mask CI failures: Verify that CI's minio_cdn service is healthy before the test job runs, so these tests actually execute rather than silently skipping.

Notes

• Uses AbortSignal.timeout(3000) for the MinIO health check — requires Node 18+, CI runs Node 22.
• Bucket names use bp-test-{RUN_ID}-{suffix} pattern with Date.now().toString(36) to avoid collisions across parallel CI runs.
• No bucket cleanup after tests — buckets are ephemeral in CI. No limit issues expected on MinIO.

Link to Devin session: https://app.devin.ai/sessions/4c882ba2dfbf4045adf85fb83cde6f77
Requested by: @pyramation

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