Expose auto-review ignore rules in config requirements (#37519)

## What changed

- Add `ignoreRules` to `AutoReviewRequirements` in the app-server v2 protocol and generated schemas.
- Return configured `auto_review.ignore_rules` values from `configRequirements/read`.
- Document that listed models ignore saved command-prefix approvals.

## Testing

- Extend config mapping and RPC tests to cover `ignore_rules`.

GitOrigin-RevId: ed74fbba7693176fe09b161bbee2cb27847e0e1e

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -7387,6 +7387,15 @@
       },
       "AutoReviewRequirements": {
         "properties": {
+          "ignoreRules": {
+            "items": {
+              "type": "string"
+            },
+            "type": [
+              "array",
+              "null"
+            ]
+          },
           "requiredOnModels": {
             "items": {
               "type": "string"