backend phase 1: config, reference & platform signals

Lay the cross-cutting platform backbone every later phase reads from. Adds
the first marketplace EF migration baseline (new `ops` schema) and the
mechanisms b2..b15 reuse: typed runtime config, an append-only audit trail,
an analytics event log, the holiday/bank-closure calendar, in-app
notifications, and the internal support-alert worklist.

Schema & migration
- New `ops` schema + migration InitialMarketplaceBaseline with 6 tables:
  PlatformConfigs (IAuditable), AuditLogs (append-only), SystemEvents,
  IranianHolidays, Notifications, SupportAlerts — with indexes/uniques and
  FKs to usr.Users. Seeded 12 config keys + 7 sample holidays via HasData.

Domain / Application
- IAuditable marker + [AuditRedacted] attribute; entities + string-code
  constant holders (config data_type, holiday type, alert type/severity/status).
- Facade contracts: IPlatformConfig, IHolidayCalendar, IAnalyticsSink,
  IAuditLogger, INotificationService, ISupportAlertService; DTOs +
  PagedResult<T>; evolved the INotificationDispatcher.Notification record to
  carry Type + DataJson; Pagination helper.
- 14 CQRS commands/queries (+ validators) wiring the endpoints to the facades.

Infrastructure
- DB-backed facade implementations in Persistence/Services/; real in-app
  INotificationDispatcher (removes the b0 log stub); notification-retention
  hosted service (purge is_read=1 AND age>90d).
- Extended AuditFieldInterceptor to also append an old/new-diff audit_logs row
  for every IAuditable change in the same transaction (PII redacted).
- Registered all facades + hosted service in AddPersistenceServices; removed
  the dispatcher registration from AddCrossCuttingSeams.

API
- 5 controllers: admin PlatformConfig/Holidays/Audit/SupportAlerts
  ([Authorize(DynamicPermission)]) + current-user Notifications ([Authorize]),
  all tenant-scoped and paginated. 16 Swagger paths total.

Money-correctness & safety rules honoured
- Config read at compute time (cached, parsed by data_type), never hardcoded;
  every config change is audited in the same transaction; audit_logs is
  append-only (no update/delete path); support alerts are admin-only;
  notifications are tenant-scoped; analytics is fire-and-forget.

Tests & docs
- 18 new foundation tests over in-memory SQLite (config typing + audit,
  holidays, notifications + tenancy + retention, support alerts, analytics);
  build clean (0 new code warnings), 22 tests green; migration applied to the
  dev DB and swagger.v1.json refreshed.
- Updated server Project map + CONVENTIONS, product data-model doc 12 (seeded
  config defaults), config-reference contract, mock registry, backend handoff/
  STATUS/report.

Follow-ups: add FK constraints for SupportAlerts.BookingId (b9) and ReviewId
(b14) when those tables land.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

dev/shared-working-context/reports/mocks-registry.md

@@ -20,7 +20,9 @@ Status legend: 🔴 not built · 🟡 mocked (seam + fake impl in place) · 🟢
 | `IBnplProvider` | backend-phase-12 | BNPL — drives state machine, fake settle/revert | _tbd_ | SnappPay/Digipay OAuth + verb set; encrypted creds in `payment_gateways.config_json` | 🔴 |
 | `ICurrencyNormalizer` | backend-phase-12 | Toman↔IRR — ×10 | _tbd_ | Config-driven per provider boundary | 🔴 |
 | `IBankTransferProvider` | backend-phase-13 | PAYA/SATNA payout — fake transfer ref | _tbd_ | Jibit/Vandar/Sadad payout; source account; PAYA vs SATNA | 🔴 |
-| `IHolidayCalendar` | backend-phase-1 | Bank holidays — seeded static table | _tbd_ | Iranian banking-holiday feed / sync job | 🔴 |
+| `IHolidayCalendar` | backend-phase-1 | Bank holidays — reads the seeded `ops.IranianHolidays` table; lookups cached (`HolidayCalendarService`, `Persistence/Services/Holidays/`); Iranian banking weekend = Friday | _none_ | Add a sync job/feed that maintains the (partly lunar-Hijri) calendar table; the read interface stays | 🟡 |
+| `IAnalyticsSink` | backend-phase-1 | Behavioural events — inserts an `ops.SystemEvents` row, fire-and-forget (`AnalyticsSink`, `Persistence/Services/Analytics/`) | _none_ | Pipe to a warehouse/stream (e.g. Kafka→ClickHouse); keep fire-and-forget semantics | 🟡 |
+| `IJobScheduler` (retention) | backend-phase-1 | Scheduling — in-process interval `BackgroundService` running `PurgeOldReadNotifications` daily (`NotificationRetentionHostedService`, `Persistence/Services/Notifications/`) | _none_ | Swap to Hangfire/Quartz; register the job there; keep the purge predicate (`is_read=1 AND age>90d`) | 🟡 |
 | `IShahkarVerifier` | backend-phase-6 | Phone↔national-id match — fake pass | _tbd_ | Real Shahkar/KYC vendor; persist `external_response_json` | 🔴 |
 | `IIdentityKycProvider` | backend-phase-6 | National-ID + liveness — fake pass | _tbd_ | Finnotech/U-ID/Jibbit/Verify liveness+OCR | 🔴 |
 | `ICredentialVerifier` | backend-phase-6 | MoH/INO/criminal-record — manual/fake | _tbd_ | Manual admin today; API when a portal appears (`verification_method=api`) | 🔴 |
@@ -29,7 +31,7 @@ Status legend: 🔴 not built · 🟡 mocked (seam + fake impl in place) · 🟢
 | `IMoadianClient` | backend-phase-11 | سامانه مودیان e-invoice — leaves ref pending | _tbd_ | Real مودیان submission → 22-digit ref | 🔴 |
 | `IReviewModerationService` | backend-phase-14 | AI moderation — keyword/pass-through | _tbd_ | Real classifier/LLM endpoint | 🔴 |
 | `IFieldEncryptor` | backend-phase-0 | PII encryption — AES-256-CBC + HMAC hash from a local symmetric key (`SymmetricFieldEncryptor`, `Baya.Infrastructure.CrossCutting/Seams/`) | `Seams:FieldEncryption:Key`, `Seams:FieldEncryption:HashKey` | KMS / column encryption / Key Vault / HSM | 🟡 |
-| `INotificationDispatcher` | backend-phase-0/15 | Notification channels — logs/no-op (`LogNotificationDispatcher`, `Baya.Infrastructure.CrossCutting/Seams/`); no write yet | _none_ | Add the in-app `notifications` write (b15) + SMS/push (FCM); polling → Redis pub/sub or SignalR later | 🟡 |
+| `INotificationDispatcher` | backend-phase-0/**1** | Notification channels — **in-app write is now real** (`InAppNotificationDispatcher`, `Persistence/Services/Notifications/`, writes an `ops.Notifications` row); b0 log stub removed. SMS/push channels still deferred (no-op) behind the same seam | _none_ | Add SMS (`ISmsSender`) / push (FCM) channels; polling → Redis pub/sub or SignalR later | 🟡 |
 | `ILicenseVerificationService` | backend-phase-15 | eNamad / MoH establishment-permit — manual approve | _tbd_ | Real registry/API | 🔴 |
 
 > Exact config keys and file paths get filled in by the phase that builds each seam. Keep the