Both policies partition by sub claim with IP fallback. Global limiter
applies to all requests; writes policy is applied via
[EnableRateLimiting("writes")] on every POST, PUT, and DELETE action
across all five controllers.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Remove OwnerUserId from BudgetDto: OIDC sub of the budget owner was
being returned to all collaborators (including View-only users)
- Remove SharedWithUserId from ShareDto: other users' internal OIDC subs
were visible to anyone with read access to a budget
- Delete MeController: scaffolding endpoint that returned sub to the
browser; no legitimate frontend use case
- Restrict /healthz to require authorization: prevents unauthenticated
probing of database connectivity
- Add input validation annotations to all request DTOs: [Required],
[MaxLength], [Range(0,0.9999)] on EffectiveTaxRate, [EmailAddress] on
share email — [ApiController] now returns 400 instead of 500 for
invalid input hitting DB constraints
- Replace User.FindFirst("sub")!.Value with GetUserId() extension across
all controllers: returns 401 instead of NullReferenceException (500)
if a token lacks a sub claim
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Spencer Twaddle