refactor(open-sse): registry consolidation + DRY media/oauth/adhoc cleanup

- Single-source registry: oauth clientId/tokenUrl, usage URLs, image/embed
  configs, search defaultModel, codex fixedPort, google token url derive.
- Remove 29 unused OmniRoute providers (registry 100→71); media intact.
- De-adhoc: codex literals → registry format/oauth flags; reasoningInject,
  image/embed openrouter headers + xai bodyFields config-driven.
- Add REGISTRY_TEMPLATE.js + expand PROVIDER_DEFAULTS/schema JSDoc.
- Baselines updated; PROVIDERS 62 + alias 90 byte-for-byte, golden snapshots.

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/providers/registry/gemini-cli.js

@@ -3,11 +3,42 @@ import { GOOGLE_OAUTH_CLIENT } from "../shared.js";
 export default {
   "id": "gemini-cli",
   "alias": "gc",
+  display: {
+      "name": "Gemini CLI",
+      "icon": "terminal",
+      "color": "#4285F4",
+      "website": "https://github.com/google-gemini/gemini-cli",
+      "notice": {
+          "signupUrl": "https://github.com/google-gemini/gemini-cli"
+      },
+      "deprecated": true,
+      "deprecationNotice": "RISK_NOTICE"
+  },
+  category: "free",
+  uiAlias: "gc",
   "transport": {
     "baseUrl": "https://cloudcode-pa.googleapis.com/v1internal",
     "format": "gemini-cli",
+    cliVersion: "0.34.0",
+    apiClient: "google-genai-sdk/1.41.0 gl-node/v22.19.0",
+    usage: {
+      quotaUrl: "https://cloudcode-pa.googleapis.com/v1internal:retrieveUserQuota",
+      loadCodeAssistUrl: "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist"
+    },
     ...GOOGLE_OAUTH_CLIENT
   },
+  "oauth": {
+    "authorizeUrl": "https://accounts.google.com/o/oauth2/v2/auth",
+    "tokenUrl": "https://oauth2.googleapis.com/token",
+    "userInfoUrl": "https://www.googleapis.com/oauth2/v1/userinfo",
+    "scopes": [
+      "https://www.googleapis.com/auth/cloud-platform",
+      "https://www.googleapis.com/auth/userinfo.email",
+      "https://www.googleapis.com/auth/userinfo.profile"
+    ]
+  ,
+    refresh: {"encoding":"form"}
+  },
   "models": [
     {
       "id": "gemini-3-flash-preview",
@@ -17,5 +48,6 @@ export default {
       "id": "gemini-3-pro-preview",
       "name": "Gemini 3 Pro Preview"
     }
-  ]
+  ],
+  features: {"usage":true},
 };