Fix architecture issues from todolist

- Add documentation warnings for in-memory rate limiting and failed login attempts
- Consolidate duplicate health endpoints into api/health.py
- Fix CLI to use correct async rescan method names
- Update download.py and anime.py to use custom exception classes
- Add WebSocket room validation and rate limiting

src/cli/Main.py

@@ -1,5 +1,6 @@
 """Command-line interface for the Aniworld anime download manager."""
 
+import asyncio
 import logging
 import os
 from typing import Optional, Sequence
@@ -179,8 +180,11 @@ class SeriesCLI:
     # Rescan logic
     # ------------------------------------------------------------------
     def rescan(self) -> None:
-        """Trigger a rescan of the anime directory using the core app."""
-        total_to_scan = self.series_app.SerieScanner.get_total_to_scan()
+        """Trigger a rescan of the anime directory using the core app.
+        
+        Uses the legacy file-based scan mode for CLI compatibility.
+        """
+        total_to_scan = self.series_app.serie_scanner.get_total_to_scan()
         total_to_scan = max(total_to_scan, 1)
 
         self._progress = Progress()
@@ -190,17 +194,16 @@ class SeriesCLI:
                 total=total_to_scan,
             )
 
-            result = self.series_app.ReScan(
-                callback=self._wrap_scan_callback(total_to_scan)
+            # Run async rescan in sync context with file-based mode
+            asyncio.run(
+                self.series_app.rescan(use_database=False)
             )
 
         self._progress = None
         self._scan_task_id = None
 
-        if result.success:
-            print(result.message)
-        else:
-            print(f"Scan failed: {result.message}")
+        series_count = len(self.series_app.series_list)
+        print(f"Scan completed. Found {series_count} series with missing episodes.")
 
     def _wrap_scan_callback(self, total: int):
         """Create a callback that updates the scan progress bar."""