ci: fix lint baseline and stabilize failing main tests

src/backup/__init__.py

@@ -7,9 +7,9 @@ This module provides:
 - Health monitoring and alerts
 """
 
-from src.backup.exporter import BackupExporter, ExportFormat
-from src.backup.scheduler import BackupScheduler, BackupPolicy
 from src.backup.cloud_storage import CloudStorage, S3Config
+from src.backup.exporter import BackupExporter, ExportFormat
+from src.backup.scheduler import BackupPolicy, BackupScheduler
 
 __all__ = [
     "BackupExporter",

src/backup/cloud_storage.py

@@ -94,7 +94,9 @@ class CloudStorage:
         if metadata:
             extra_args["Metadata"] = metadata
 
-        logger.info("Uploading %s to s3://%s/%s", file_path.name, self.config.bucket_name, object_key)
+        logger.info(
+            "Uploading %s to s3://%s/%s", file_path.name, self.config.bucket_name, object_key
+        )
 
         try:
             self.client.upload_file(

src/backup/exporter.py

@@ -14,14 +14,14 @@ import json
 import logging
 import sqlite3
 from datetime import UTC, datetime
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 from typing import Any
 
 logger = logging.getLogger(__name__)
 
 
-class ExportFormat(str, Enum):
+class ExportFormat(StrEnum):
     """Supported export formats."""
 
     JSON = "json"
@@ -103,15 +103,11 @@ class BackupExporter:
         elif fmt == ExportFormat.CSV:
             return self._export_csv(output_dir, timestamp, compress, incremental_since)
         elif fmt == ExportFormat.PARQUET:
-            return self._export_parquet(
-                output_dir, timestamp, compress, incremental_since
-            )
+            return self._export_parquet(output_dir, timestamp, compress, incremental_since)
         else:
             raise ValueError(f"Unsupported format: {fmt}")
 
-    def _get_trades(
-        self, incremental_since: datetime | None = None
-    ) -> list[dict[str, Any]]:
+    def _get_trades(self, incremental_since: datetime | None = None) -> list[dict[str, Any]]:
         """Fetch trades from database.
 
         Args:
@@ -164,9 +160,7 @@ class BackupExporter:
 
         data = {
             "export_timestamp": datetime.now(UTC).isoformat(),
-            "incremental_since": (
-                incremental_since.isoformat() if incremental_since else None
-            ),
+            "incremental_since": (incremental_since.isoformat() if incremental_since else None),
             "record_count": len(trades),
             "trades": trades,
         }
@@ -284,8 +278,7 @@ class BackupExporter:
             import pyarrow.parquet as pq
         except ImportError:
             raise ImportError(
-                "pyarrow is required for Parquet export. "
-                "Install with: pip install pyarrow"
+                "pyarrow is required for Parquet export. Install with: pip install pyarrow"
             )
 
         # Convert to pyarrow table

src/backup/health_monitor.py

@@ -14,14 +14,14 @@ import shutil
 import sqlite3
 from dataclasses import dataclass
 from datetime import UTC, datetime, timedelta
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 from typing import Any
 
 logger = logging.getLogger(__name__)
 
 
-class HealthStatus(str, Enum):
+class HealthStatus(StrEnum):
     """Health check status."""
 
     HEALTHY = "healthy"
@@ -137,9 +137,13 @@ class HealthMonitor:
             used_percent = (stat.used / stat.total) * 100
 
             if stat.free < self.min_disk_space_bytes:
+                min_disk_gb = self.min_disk_space_bytes / 1024 / 1024 / 1024
                 return HealthCheckResult(
                     status=HealthStatus.UNHEALTHY,
-                    message=f"Low disk space: {free_gb:.2f} GB free (minimum: {self.min_disk_space_bytes / 1024 / 1024 / 1024:.2f} GB)",
+                    message=(
+                        f"Low disk space: {free_gb:.2f} GB free "
+                        f"(minimum: {min_disk_gb:.2f} GB)"
+                    ),
                     details={
                         "free_gb": free_gb,
                         "total_gb": total_gb,

src/backup/scheduler.py

@@ -12,14 +12,14 @@ import logging
 import shutil
 from dataclasses import dataclass
 from datetime import UTC, datetime, timedelta
-from enum import Enum
+from enum import StrEnum
 from pathlib import Path
 from typing import Any
 
 logger = logging.getLogger(__name__)
 
 
-class BackupPolicy(str, Enum):
+class BackupPolicy(StrEnum):
     """Backup retention policies."""
 
     DAILY = "daily"
@@ -69,9 +69,7 @@ class BackupScheduler:
         for d in [self.daily_dir, self.weekly_dir, self.monthly_dir]:
             d.mkdir(parents=True, exist_ok=True)
 
-    def create_backup(
-        self, policy: BackupPolicy, verify: bool = True
-    ) -> BackupMetadata:
+    def create_backup(self, policy: BackupPolicy, verify: bool = True) -> BackupMetadata:
         """Create a database backup.
 
         Args:
@@ -229,9 +227,7 @@ class BackupScheduler:
 
         return removed
 
-    def list_backups(
-        self, policy: BackupPolicy | None = None
-    ) -> list[BackupMetadata]:
+    def list_backups(self, policy: BackupPolicy | None = None) -> list[BackupMetadata]:
         """List available backups.
 
         Args: