feat: add appointments, campaigns, admin, storage, tests and various updates

- Add new routers: admin, appointments, campaigns
- Add storage service and logging config
- Add migrations directory and test suite with pytest config
- Add supabase_migration_features.sql
- Update models, dependencies, config, and existing routers
- Remove whatsapp_service (deleted)
- Update pyproject.toml and uv.lock dependencies

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/services/storage.py

@@ -0,0 +1,46 @@
+"""
+Supabase Storage helper utilities.
+Used to delete files from storage buckets when deleting documents or chatbots.
+"""
+import logging
+from typing import Optional
+from urllib.parse import urlparse
+
+logger = logging.getLogger(__name__)
+
+
+def extract_storage_path(url: str, bucket: str) -> Optional[str]:
+    """
+    Extract the file path from a Supabase Storage public URL.
+
+    URL format: {supabase_url}/storage/v1/object/public/{bucket}/{path}
+    Returns the path portion after the bucket name, or None if not parseable.
+    """
+    if not url:
+        return None
+    try:
+        parsed = urlparse(url)
+        prefix = f"/storage/v1/object/public/{bucket}/"
+        if prefix in parsed.path:
+            idx = parsed.path.index(prefix) + len(prefix)
+            return parsed.path[idx:]
+    except Exception as e:
+        logger.warning(f"Failed to extract storage path from URL '{url}': {e}")
+    return None
+
+
+def delete_from_storage(supabase, bucket: str, url: str) -> bool:
+    """
+    Delete a file from a Supabase Storage bucket given its public URL.
+    Returns True on success, False if the URL couldn't be parsed or deletion failed.
+    """
+    path = extract_storage_path(url, bucket)
+    if not path:
+        return False
+    try:
+        supabase.storage.from_(bucket).remove([path])
+        logger.info(f"Deleted storage file: {bucket}/{path}")
+        return True
+    except Exception as e:
+        logger.warning(f"Failed to delete storage file {bucket}/{path}: {e}")
+        return False