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/byteplus.js

@@ -1,10 +1,28 @@
+
 export default {
   "id": "byteplus",
   "alias": "byteplus",
+  display: {
+      "name": "BytePlus ModelArk",
+      "icon": "cloud",
+      "color": "#2563EB",
+      "textIcon": "BP",
+      "website": "https://console.byteplus.com/ark",
+      "notice": {
+          "text": "Free credits for new accounts. Access to Seed 2.0, Kimi K2 Thinking, GLM 4.7, GPT-OSS-120B models.",
+          "apiKeyUrl": "https://console.byteplus.com/ark/region:ark+ap-southeast-1/apiKey"
+      }
+  },
+  category: "freeTier",
+  uiAlias: "bpm",
+  aliases: ["bpm"],
   "transport": {
     "baseUrl": "https://ark.ap-southeast.bytepluses.com/api/coding/v3/chat/completions",
     "headers": {}
   },
+  media: {
+    serviceKinds: ["llm"]
+  },
   "models": [
     {
       "id": "seed-2-0-pro-260328",