build(deps): bump fastapi from >=0.115.6 to >=0.133.1

Relax python-multipart upper bound from <0.0.10 to uncapped.
Resolves to FastAPI 0.135.1 with new transitive dep annotated-doc.
No code changes required — all existing tests pass.

Closes TASK-001

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

Author: pythoninthegrass

backlog/tasks/task-001 - Bump-FastAPI-from-0.115.6-to-0.133.1.md

@@ -1,10 +1,10 @@
 ---
 id: TASK-001
 title: Bump FastAPI from >=0.115.6 to >=0.133.1
-status: To Do
+status: In Progress
 assignee: []
 created_date: '2026-02-26 16:25'
-updated_date: '2026-03-17 02:09'
+updated_date: '2026-03-21 01:19'
 labels:
   - dependencies
 dependencies:
@@ -27,8 +27,14 @@ Update FastAPI dependency in pyproject.toml from >=0.115.6 to >=0.133.1. This is
 
 ## Acceptance Criteria
 <!-- AC:BEGIN -->
-- [ ] #1 Review and update test suite for compatibility with FastAPI 0.133.1 before upgrading
-- [ ] #2 Bump fastapi dependency to >=0.133.1 in pyproject.toml
-- [ ] #3 All existing tests pass after upgrade
-- [ ] #4 Verify /token, /healthz, /, and /auth/login endpoints work correctly
+- [x] #1 Review and update test suite for compatibility with FastAPI 0.133.1 before upgrading
+- [x] #2 Bump fastapi dependency to >=0.133.1 in pyproject.toml
+- [x] #3 All existing tests pass after upgrade
+- [x] #4 Verify /token, /healthz, /, and /auth/login endpoints work correctly
 <!-- AC:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+Upgraded from FastAPI 0.115.14 to 0.135.1 (resolved from >=0.133.1). Relaxed python-multipart upper bound from <0.0.10 to uncapped. No code changes required — all APIs used (TestClient, Form, Depends, CORSMiddleware, etc.) remained stable. New transitive dep: annotated-doc 0.0.4.
+<!-- SECTION:NOTES:END -->

pyproject.toml

@@ -15,7 +15,7 @@ dependencies = [
     "bcrypt==4.0.1",
     "colorama>=0.4.5,<0.5",
     "exceptiongroup>=1.2.2,<2",
-    "fastapi>=0.115.6",
+    "fastapi>=0.133.1",
     "gunicorn>=23.0.0,<24",
     "hishel>=1.1.9",
     "httpx>=0.28.1",
@@ -28,7 +28,7 @@ dependencies = [
     "PyJWT[crypto]>=2.10.1,<3",
     "python-decouple~=3.8",
     "python-jose[cryptography]>=3.3.0,<4",
-    "python-multipart>=0.0.9,<0.0.10",
+    "python-multipart>=0.0.9",
     "slack-sdk>=3.34.0,<4",
     "uvicorn>=0.29.0,<0.30",
     "wheel>=0.43.0,<0.44",