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/codebuddy.js

@@ -1,7 +1,18 @@
+
 export default {
-  "id": "codebuddy",
-  "alias": "codebuddy",
+  "id": "codebuddy",  display: { name: "CodeBuddy", icon: "smart_toy", color: "#006EFF", website: "https://copilot.tencent.com", notice: { signupUrl: "https://copilot.tencent.com" } },
+  category: "oauth",
   "transport": {
-    "baseUrl": "https://copilot.tencent.com/v1/chat/completions"
+    "baseUrl": "https://copilot.tencent.com/v1/chat/completions",
+      auth: {"combined":true,"header":"Authorization","scheme":"bearer"},
+  },
+  "oauth": {
+    "baseUrl": "https://copilot.tencent.com",
+    "stateUrl": "https://copilot.tencent.com/v2/plugin/auth/state",
+    "tokenUrl": "https://copilot.tencent.com/v2/plugin/auth/token",
+    "refreshUrl": "https://copilot.tencent.com/v2/plugin/auth/token/refresh",
+    "userAgent": "CLI/2.63.2 CodeBuddy/2.63.2",
+    "platform": "CLI",
+    "pollInterval": 5000
   }
 };