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/anthropic.js

@@ -3,11 +3,25 @@ import { CLAUDE_API_HEADERS } from "../shared.js";
 export default {
   id: "anthropic",
   alias: "anthropic",
+  display: {
+      "name": "Anthropic",
+      "icon": "smart_toy",
+      "color": "#D97757",
+      "textIcon": "AN",
+      "website": "https://console.anthropic.com",
+      "notice": {
+          "apiKeyUrl": "https://console.anthropic.com/settings/keys"
+      }
+  },
+  category: "apikey",
   transport: {
     baseUrl: "https://api.anthropic.com/v1/messages",
     format: "claude",
     headers: { ...CLAUDE_API_HEADERS }
   },
+  media: {
+    serviceKinds: ["llm", "imageToText"]
+  },
   models: [
     { id: "claude-sonnet-4-20250514", name: "Claude Sonnet 4" },
     { id: "claude-opus-4-20250514", name: "Claude Opus 4" },