Backend refactoring updates

- Update Docker compose debug configuration
- Update backend documentation
- Update tasks documentation
- Update backend config module

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/app/config.py

@@ -98,9 +98,10 @@ class Settings(BaseSettings):
         ),
     )
     session_cookie_secure: bool = Field(
-        default=False,
+        default=True,
         description=(
-            "Set the session cookie Secure flag when the backend is served over HTTPS."
+            "Set the session cookie Secure flag when the backend is served over HTTPS. "
+            "Defaults to True for security. Set to False only for local development over HTTP."
         ),
     )
     cors_allowed_origins: str | list[str] = Field(