feat: add backup monitoring pydantic models

backend/src/media_library_viewer_api/models/backups.py

@@ -0,0 +1,65 @@
+from datetime import datetime
+from typing import Any
+from pydantic import BaseModel, Field, field_validator
+
+
+class BackupReportRequest(BaseModel):
+    name: str = Field(..., min_length=1)
+    source: str | None = None
+    target: str | None = None
+    schedule_interval_seconds: int | None = Field(None, gt=0)
+    started_at: datetime
+    ended_at: datetime | None = None
+    status: str = Field(..., pattern="^(success|failure|in_progress)$")
+    bytes_transferred: int | None = Field(None, ge=0)
+    duration_ms: int | None = None
+    error_message: str | None = None
+    details: dict[str, Any] | None = None
+
+    @field_validator("ended_at", "duration_ms")
+    @classmethod
+    def validate_success_fields(cls, v, info):
+        if info.data.get("status") == "success" and v is None:
+            raise ValueError(f"{info.field_name} is required when status is 'success'")
+        return v
+
+
+class BackupJobResponse(BaseModel):
+    id: str
+    name: str
+    source: str | None
+    target: str | None
+    schedule_interval_seconds: int | None
+    created_at: int
+
+
+class BackupRunResponse(BaseModel):
+    id: str
+    job_id: str
+    started_at: int
+    ended_at: int | None
+    status: str
+    bytes_transferred: int | None
+    duration_ms: int | None
+    error_message: str | None
+    details_json: dict[str, Any] | None
+    created_at: int
+
+
+class BackupAlertResponse(BaseModel):
+    id: str
+    job_id: str
+    run_id: str | None
+    alert_type: str
+    severity: str
+    message: str
+    acknowledged: bool
+    resolved_at: int | None
+    created_at: int
+
+
+class BackupDashboardSummary(BaseModel):
+    total_jobs: int
+    success_rate_24h: float
+    active_alerts: int
+    last_failed_at: int | None

backend/tests/test_backups.py

@@ -14,3 +14,18 @@ def test_backup_schema_created():
             assert "backup_jobs" in table_names
             assert "backup_runs" in table_names
             assert "backup_alerts" in table_names
+
+
+def test_backup_report_model():
+    from media_library_viewer_api.models.backups import BackupReportRequest
+
+    report = BackupReportRequest(
+        name="test-backup",
+        started_at="2026-05-11T02:00:00Z",
+        status="success",
+        ended_at="2026-05-11T02:15:00Z",
+        duration_ms=900000,
+        bytes_transferred=1024,
+    )
+    assert report.name == "test-backup"
+    assert report.status == "success"