Add frontend access control enhancements and JWT support

- Hide New Project button for unauthenticated users, show login link
- Add lock icon for private projects on home page
- Show access level badges on project cards (Owner, Admin, Write, Read)
- Add permission expiration date field to AccessManagement component
- Add query timeout configuration for database (ORCHARD_DATABASE_QUERY_TIMEOUT)
- Add JWT token validation support for external identity providers
  - Configurable via ORCHARD_JWT_* environment variables
  - Supports HS256 with secret or RS256 with JWKS
  - Auto-provisions users from JWT claims

backend/app/schemas.py

@@ -47,6 +47,13 @@ class ProjectUpdate(BaseModel):
     is_public: Optional[bool] = None
 
 
+class ProjectWithAccessResponse(ProjectResponse):
+    """Project response with user's access level included"""
+
+    access_level: Optional[str] = None  # 'read', 'write', 'admin', or None
+    is_owner: bool = False
+
+
 # Package format and platform enums
 PACKAGE_FORMATS = [
     "generic",