migration-script-runner / msr-core / 619d4ddb-f808-4e0a-8377-725d6e5ac7e2

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Pull #137

circleci

#85: Add locking mechanism interfaces and configuration (Phase 1)

Foundation for preventing concurrent migration execution in production
deployments (Kubernetes, CI/CD pipelines).

Added:
- ILockingService<DB> with two-phase locking protocol (acquire → verify)
- ILockStatus for CLI lock status queries
- LockingConfig with validation (timeout, retries, SQL injection protection)
- Config.locking property (default: enabled, 10min timeout, fail-fast)
- IDatabaseMigrationHandler.lockingService (optional, adapter-specific)

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