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/config/providerModels.js

@@ -1,12 +1,12 @@
 import { PROVIDERS } from "./providers.js";
+import REGISTRY from "../providers/registry/index.js";
 // PROVIDER_MODELS now built from providers/registry (transport + models co-located)
 import { PROVIDER_MODELS } from "../providers/index.js";
 import { modelQuotaFamily, modelStrip, modelTargetFormat } from "../providers/models/schema.js";
+import { CODEX_REVIEW_SUFFIX } from "../providers/models/helpers.js";
 
 export { PROVIDER_MODELS };
 
-const CODEX_REVIEW_SUFFIX = "-review";
-
 
 // Helper functions
 export function getProviderModels(aliasOrId) {
@@ -60,27 +60,11 @@ export function getModelQuotaFamily(aliasOrId, modelId) {
   return modelQuotaFamily(models?.find(m => m.id === modelId));
 }
 
-// OAuth providers that use short aliases (everything else: alias = id)
-// Single source of canonical id→alias; services/model.js derives the reverse.
-export const OAUTH_ALIASES = {
-  claude: "cc",
-  codex: "cx",
-  "gemini-cli": "gc",
-  qwen: "qw",
-  iflow: "if",
-  antigravity: "ag",
-  github: "gh",
-  kiro: "kr",
-  cursor: "cu",
-  "kimi-coding": "kmc",
-  kilocode: "kc",
-  cline: "cl",
-  opencode: "oc",
-  qoder: "qd",
-  "mimo-free": "mmf",
-  vertex: "vertex",
-  "vertex-partner": "vertex-partner",
-};
+// OAuth short aliases — derived from registry `alias` (single source). everything else: alias = id.
+// vertex/vertex-partner keep alias=id (kept via the `|| id` fallback in consumers).
+export const OAUTH_ALIASES = Object.fromEntries(
+  REGISTRY.filter(r => r.alias && r.alias !== r.id).map(r => [r.id, r.alias])
+);
 
 // Derived from PROVIDERS — no need to maintain manually
 export const PROVIDER_ID_TO_ALIAS = Object.fromEntries(