refactor(open-sse): B1 consolidate media endpoint URLs into registry

- image/embed/tts/search base URLs derive from media.*Config.baseUrl /
  searchViaChat.endpoint (single source); handlers read PROVIDER_MEDIA.
- ~18 hardcoded endpoints moved: bfl/fal/stability/runway/hf/gemini/
  cloudflare/recraft/sdwebui/comfyui/nanobanana image, voyage embed,
  gemini/openrouter tts, chatSearch endpoints.
- Byte-identical: PROVIDERS 62 + alias 90 baselines, image buildUrl outputs.

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

open-sse/providers/registry/cloudflare-ai.js

@@ -22,7 +22,8 @@ export default {
   },
   media: {
     serviceKinds: ["llm", "image"],
-    hasProviderSpecificData: true
+    hasProviderSpecificData: true,
+    imageConfig: { baseUrl: "https://api.cloudflare.com/client/v4/accounts" }
   },
   "models": [
     {