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/models/schema.js

@@ -1,3 +1,5 @@
+import { deriveModelName } from "./namePatterns.js";
+
 // Model defaults centralized (was scattered as `m.type || "llm"`, `quotaFamily || "normal"`, etc.)
 export const MODEL_DEFAULTS = {
   type: "llm",
@@ -6,6 +8,14 @@ export const MODEL_DEFAULTS = {
   targetFormat: null
 };
 
+// Normalize a registry model entry: accept terse "id" string, fill name via regex when omitted.
+// Override always wins (raw spread last); name falls back to regex → id.
+export function normalizeModel(raw) {
+  const model = typeof raw === "string" ? { id: raw } : raw;
+  if (model.name !== undefined) return model;
+  return { ...model, name: deriveModelName(model.id) };
+}
+
 // Resolve a single field with its default (keeps accessor call-sites one-liners)
 export function modelType(model) {
   return model?.type || MODEL_DEFAULTS.type;