D09: Import record event history for revision tracking

- Add ImportRecordEvent model to track per-record import changes
- Log created/updated events for each official record import
- Add alembic migration 0014 for import_record_event table
- Enables audit trail for which import run modified which records

apps/api/app/importer.py

@@ -13,7 +13,7 @@ from sqlalchemy.orm import Session
 from rf4_research.official_parser import RecordsContractError, parse_official_records
 
 from .models import (
-    Bait, BaitKind, CatchReport, Fish, ImportStatus, ModerationStatus,
+    Bait, BaitKind, CatchReport, Fish, ImportRecordEvent, ImportStatus, ModerationStatus,
     OfficialRecordImport, SourceType, Waterbody,
 )
 
@@ -185,12 +185,16 @@ def _import_records_locked(session: Session, *, url: str, region: str, category:
             bait = _bait(session, raw.bait) if raw.bait else None
             payload = asdict(raw) | {"record_date": raw.record_date.isoformat()}
             caught = datetime.combine(raw.record_date, time(), tzinfo=timezone.utc)
+            now = datetime.now(timezone.utc)
             if report is None:
-                session.add(CatchReport(fish=fish, waterbody=waterbody, bait=bait, spot=None, weight_g=raw.weight_g, caught_at=caught, reported_at=datetime.now(timezone.utc), player_name=raw.player, source_type=SourceType.official_record, source_url=url, source_external_id=key, source_confidence=100, moderation_status=ModerationStatus.approved, raw_payload=payload))
+                report = CatchReport(fish=fish, waterbody=waterbody, bait=bait, spot=None, weight_g=raw.weight_g, caught_at=caught, reported_at=now, player_name=raw.player, source_type=SourceType.official_record, source_url=url, source_external_id=key, source_confidence=100, moderation_status=ModerationStatus.approved, raw_payload=payload)
+                session.add(report)
+                session.add(ImportRecordEvent(catch_report=report, import_run=run, event_type="created", created_at=now))
                 run.rows_created += 1
             else:
                 report.raw_payload = payload
                 report.source_url = url
+                session.add(ImportRecordEvent(catch_report=report, import_run=run, event_type="updated", created_at=now))
                 run.rows_updated += 1
         run.status = ImportStatus.success
         run.finished_at = datetime.now(timezone.utc)

apps/api/app/models.py

@@ -212,3 +212,15 @@ class ExternalEntityAlias(Base):
     updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
     fish: Mapped[Fish | None] = relationship()
     waterbody: Mapped[Waterbody | None] = relationship()
+
+
+class ImportRecordEvent(Base):
+    """Track per-record import events for D09 revision history."""
+    __tablename__ = "import_record_event"
+    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
+    catch_report_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("catch_report.id"), index=True)
+    import_run_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("official_record_import.id"), index=True)
+    event_type: Mapped[str] = mapped_column(String(20))  # created/updated/deleted
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True))
+    catch_report: Mapped[CatchReport] = relationship()
+    import_run: Mapped[OfficialRecordImport] = relationship()