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Oliver Kieselbach
d4034842ee
Adds the full backup pipeline that snapshots 15 critical tables (Admin/Tenant config, rules, identities, audit, preview) into a logically-isolated blob container, daily at 04:00 UTC and on operator demand. Restore endpoints follow in PR2/PR3. Architecture: * Daily TimerTrigger + manual POST /api/global/backups/trigger (GA-only, fail-hard producer). HTTP returns 202 + jobId on enqueue, 500 if the queue write fails (and the BackupJobs row is rolled to Failed). * BackgroundService queue worker (not QueueTrigger — matches the Analyze/ IndexReconcile pattern that avoids the Functions-host connection-binding app-setting). Worker holds the maintenance lease for the whole run; service is intentionally lease-unaware so it stays unit-testable. * BlobBackupStore wraps the new 'critical-table-backups' container with a shared maintenance-lease sentinel at '_lock/maintenance.lock' that serialises every backup or restore op across worker/timer/single-row paths. * CriticalTableBackupService streams each table through CryptoStream(SHA256) into per-table NDJSON blobs, then writes manifest.json LAST as the durability anchor. Per-table failures degrade Outcome to Partial without aborting; per-run budget (50 min) → Skipped status. * BackupJobsRepository persists the six-state machine (Queued/Running/Completed/Failed/Skipped/BlockedTerminal) with ETag-CAS updates. Enum→string mapping rejects unknown values on read so refactors surface loudly instead of silently shifting state. * BackupJobWatchdog (30 min timer) heals stuck rows via a probe lease on the shared sentinel: Queued > 60 min → Failed, Running with stale heartbeat AND free lease → Failed (lease-busy means a live worker — leave alone). * OpsEvents: distinct CriticalTableBackupPartial (Warning) vs Failed (Error) so operators can wire softer Telegram rules for partial captures. * MaintenanceService.MonitoredPoisonQueues + OPS_EVENT_TYPES catalog registered (dual-register memory). Test coverage (15 new tests, 1952/1952 backend xUnit green): * BackupManifestJsonTests: enum-as-string (allowIntegerValues=false rejects numeric values), DictionaryKeyPolicy unset (Azure column names preserved case-faithfully), manifest field round-trip. * BackupJobsRepositoryMappingTests: full entity↔domain round-trip, unknown Kind/State/BackupOutcome rejected, legacy BackupOutcome="Failed" rejected. * CriticalTableBackupServiceTests: happy/partial/empty/budget-exceeded paths exercise the per-table loop with in-memory table + blob fakes. Setup: scripts/Backup/setup-backup-container.ps1 — idempotent az-CLI bootstrap for container + lifecycle rule (90 d delete on prefix). Soft-Delete and Versioning are NOT applied automatically (storage-account-wide blast radius — operator must validate per separate doc note). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>