test: add test suite with 65 tests, 73% coverage

- Unit tests: password hashing, notification providers, webhook field parsing
- Integration tests: auth routes (register/login/confirm-email/logout),
  invite flow, Evotor webhooks (/user/create, /user/verify, /user/token),
  admin panel (access control, activate/suspend/delete/reset-password)
- conftest: SQLite in-memory engine, transactional sessions, factory-boy
  factories (UserFactory with UserRoleEnum variants)
- Fix bcrypt: replace passlib (broken on Python 3.14 + bcrypt 5.x) with
  direct bcrypt calls; drop passlib from requirements.txt
- Fix datetime.utcnow() deprecation across routes and tests
- Fix Jinja2 TemplateResponse signature (request as first positional arg)
- Add coverage config to pyproject.toml

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

web/routes/invite.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 from fastapi import APIRouter, Depends, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
@@ -17,7 +17,7 @@ router = APIRouter()
 def _render(request: Request, template: str, ctx: dict) -> HTMLResponse:
     ctx["request"] = request
     ctx.setdefault("jivosite_widget_id", settings.JIVOSITE_WIDGET_ID)
-    return templates.TemplateResponse(template, ctx)
+    return templates.TemplateResponse(ctx.pop("request"), template, ctx)
 
 
 def _bad_token(request: Request) -> HTMLResponse:
@@ -33,7 +33,7 @@ def _bad_token(request: Request) -> HTMLResponse:
 async def invite_get(request: Request, db: Session = Depends(get_db)):
     token = request.query_params.get("token", "")
     user = db.query(User).filter(User.invite_token == token).first()
-    if not user or not user.invite_expires or user.invite_expires < datetime.utcnow():
+    if not user or not user.invite_expires or user.invite_expires < datetime.now(timezone.utc).replace(tzinfo=None):
         return _bad_token(request)
     return _render(request, "invite.html", {"user": None, "invite_user": user, "token": token})
 
@@ -42,7 +42,7 @@ async def invite_get(request: Request, db: Session = Depends(get_db)):
 async def invite_post(request: Request, db: Session = Depends(get_db)):
     token = request.query_params.get("token", "")
     invite_user = db.query(User).filter(User.invite_token == token).first()
-    if not invite_user or not invite_user.invite_expires or invite_user.invite_expires < datetime.utcnow():
+    if not invite_user or not invite_user.invite_expires or invite_user.invite_expires < datetime.now(timezone.utc).replace(tzinfo=None):
         return _bad_token(request)
 
     form = await request.form()