chore: use ppetru as dev mode username

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/animaltrack/web/middleware.py

@@ -184,7 +184,7 @@ def auth_before(req: Request, settings: Settings, db) -> Response | None:
     # Dev mode: bypass auth entirely
     if settings.dev_mode:
         req.scope["auth"] = User(
-            username="dev",
+            username="ppetru",
             role=UserRole.ADMIN,
             active=True,
             created_at_utc=0,