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/glm-cn.js

@@ -1,9 +1,22 @@
+
 export default {
   "id": "glm-cn",
   "alias": "glm-cn",
+  display: {
+      "name": "GLM (China)",
+      "icon": "code",
+      "color": "#DC2626",
+      "textIcon": "GC",
+      "website": "https://open.bigmodel.cn",
+      "notice": {
+          "apiKeyUrl": "https://open.bigmodel.cn/usercenter/apikeys"
+      }
+  },
+  category: "apikey",
   "transport": {
     "baseUrl": "https://open.bigmodel.cn/api/coding/paas/v4/chat/completions",
-    "headers": {}
+    "headers": {},
+    usage: { url: "https://open.bigmodel.cn/api/monitor/usage/quota/limit" }
   },
   "models": [
     {
@@ -26,5 +39,6 @@ export default {
       "id": "glm-4.5-air",
       "name": "GLM-4.5-Air"
     }
-  ]
+  ],
+  features: {"usage":true,"usageApikey":true},
 };