Update Python version requirements and fix compatibility issues

- Bump minimum Python version from 3.11 to 3.13 across all apps
- Add Python 3.11-3.13 test matrix to CLI workflow
- Document Python 3.11+ requirement in .env.example
- Fix Starlette Broadcast removal with in-process fallback implementation
- Add _InProcessBroadcast class for tests when Starlette Broadcast is unavailable
- Refactor API key validators to read live settings instead of cached values
- Update database models with explicit

apps/zk-circuits/package.json

@@ -18,9 +18,9 @@
   },
   "dependencies": {
     "circom": "^0.5.46",
-    "snarkjs": "^0.7.5",
     "circomlib": "^2.0.5",
-    "ffjavascript": "^0.2.60"
+    "ffjavascript": "^0.2.60",
+    "snarkjs": "^0.7.5"
   },
   "devDependencies": {
     "chai": "^4.3.7",