fix(translator): ESM-safe registry + tool-id pairing + responses max_tokens; add real-creds tests

- translator/index.js: replace require() with static side-effect imports (ESM-safe),
  lazy-init registry maps to survive circular import order
- openai-responses->openai: map max_output_tokens -> max_tokens (avoid leaking field upstream)
- gemini/antigravity -> openai: derive deterministic tool_call id from name so
  functionCall/functionResponse pair correctly (fixes provider tool-pairing 400s)
- add offline unit tests (finish-reason, usage, session-manager, ollama malformed args, const guard)
- add real-creds integration tests (provider-cases + all-formats matrix: 6 inbound formats x 4 scenarios)

Includes co-located provider registry refactor (pricing/capabilities/media providers) and sessionManager updates.

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

open-sse/providers/registry/google-pse.js

@@ -0,0 +1,35 @@
+export default {
+  id: "google-pse",
+  alias: "gpse",
+  display: {
+    name: "Google PSE",
+    icon: "search",
+    color: "#4285F4",
+    textIcon: "GP",
+    website: "https://programmablesearchengine.google.com",
+    notice: {
+      apiKeyUrl: "https://programmablesearchengine.google.com/controlpanel/create"
+    }
+  },
+  category: "apikey",
+  authType: "apikey",
+  serviceKinds: [
+    "webSearch"
+  ],
+  searchConfig: {
+    baseUrl: "https://www.googleapis.com/customsearch/v1",
+    method: "GET",
+    authType: "apikey",
+    authHeader: "key",
+    costPerQuery: 0.005,
+    freeMonthlyQuota: 3000,
+    searchTypes: [
+      "web",
+      "news"
+    ],
+    defaultMaxResults: 5,
+    maxMaxResults: 10,
+    timeoutMs: 10000,
+    cacheTTLMs: 300000
+  }
+};