fix: upgrade SQLAlchemy to 2.0.48 for Python 3.14 compatibility

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
Agent-Logs-Url: https://github.com/christianlouis/pop_puller_to_gmail/sessions/222505d6-7a47-4202-a77a-315550f83178

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Downgraded `eslint` from `^10` to `^9` in the frontend to resolve `TypeError: contextOrFilename.getFilename is not a function` caused by ESLint 10 removing the `getFilename()` API used by `eslint-plugin-react` bundled in `eslint-config-next`
+- Upgraded `sqlalchemy` from `2.0.25` to `2.0.48` to fix `AssertionError: Class ... directly inherits TypingOnly but has additional attributes` on Python 3.14 (`__static_attributes__`, `__firstlineno__`)
 
 ### Added
 - **Database-backed configuration**: `AppSetting` model and `ConfigService` for hybrid config (DB-first, env-var fallback)

backend/requirements.txt

@@ -5,7 +5,7 @@ pydantic==2.12.5
 pydantic-settings==2.13.1
 
 # Database
-sqlalchemy==2.0.25
+sqlalchemy==2.0.48  # Updated: Fixed Python 3.14 incompatibility with TypingOnly assertion (was 2.0.25)
 alembic==1.13.1
 psycopg2-binary==2.9.11
 asyncpg==0.31.0

docs/TODO.md

@@ -96,6 +96,7 @@ Comprehensive task breakdown for repository improvements and production readines
 - [x] Set up automatic dependency updates (Dependabot)
 - [x] Merge Dependabot dependency updates (PRs #26–#49)
 - [x] Remove CodeQL checks from CI (was blocking builds)
+- [x] Upgrade SQLAlchemy to 2.0.48 to fix Python 3.14 test failures
 
 ### In Progress 🔨
 - [ ] Configure branch protection rules