v0.4.5

Added

• Added per-instance serialization for Spanner Admin database lifecycle operations so concurrent CreateDatabase and DropDatabase long-running operations do not collide on emulator or Omni instance admin paths.
• Added retry-backed database drop cleanup with a longer database-specific timeout budget, including Clients.Close and rollback paths.
• Added --with-default-database for spanemuboost serve omni to preserve the previous eager default database bootstrap behavior when needed.
• Added Omni rollback smoke coverage for TestOpenOmniClientsRollsBackCreatedDatabaseOnFailure.
• Added regression coverage for defensive Clients.ClientOptions() copies, deprecated NewClients fixed-resource teardown, failed setup rollback, admin lock cancellation, drop retry budgeting, NotFound cleanup completion, and forced teardown of reused databases.

Changed

• Changed spanemuboost serve omni to skip instance and database bootstrap by default, leaving only Omni's built-in spanner-info database until clients create their own databases.
• Routed deprecated NewEmulatorWithClients and NewClients through the shared rollback-capable bootstrap path so their teardown and rollback behavior matches the modern client helpers.
• Kept Clients.InstanceClient consistently available even when instance creation is disabled, including the Omni default/default case where an instance admin client is still a coherent part of the public Clients shape.
• Made Clients.ClientOptions() return a defensive copy.
• Hardened Omni client connection options to use passthrough:/// with dial settings validation skipped, matching emulator-style endpoint handling.
• Improved startup failure cleanup by using bounded close contexts and preserving both bootstrap and close errors where applicable.
• Treat CreateDatabase AlreadyExists as reuse of an already-bootstrapped database without re-applying setup DDLs. Reused resources are not rolled back or dropped on close by default, while explicit ForceSchemaTeardown() still forces teardown.
• Database cleanup now treats NotFound as complete, uses timer-safe retry backoff, and gives database-only teardown a database-specific retry budget.
• Pinned the lint workflow to the repository Go version and golangci-lint v2.12.2, and updated checkout/setup-go action majors for reproducibility.
• Promoted golang.org/x/sync to a direct dependency for the semaphore used by the admin lifecycle lock.

Validation

• git diff --check v0.4.4..origin/main
• Release worktree at origin/main:
  • go test ./... -run '^$'
  • go test ./... -run 'TestWithInstanceAdminLockCancelsWhileWaiting|TestDropDatabaseRetryBudget|TestDropDatabaseComplete|TestParseServeArgs|TestParseServeArgsOmniWithDefaultDatabase|TestClientsCloseNilSafeAndIdempotent|TestClientsClientOptionsReturnsCopy'
  • make lint
• GitHub Actions on origin/main commit c03b262: Go, golangci-lint, and dependency graph update succeeded.
• PR checks for #67, #68, and #69 passed, including build-and-test, lint, omni-smoke, and podman-smoke.
• Gemini Code Assist reviewed the final #69 head with no comments to address.

Merged PRs

• #69 Serialize admin lifecycle ops and adjust Omni serve bootstrap
• #68 ci: pin lint workflow and include Omni rollback smoke test
• #67 Fix deprecated clients bootstrap and Omni runtime cleanup semantics