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/translator/request/openai-to-kiro.js

@@ -5,6 +5,7 @@
 import { register } from "../index.js";
 import { FORMATS } from "../formats.js";
 import { v4 as uuidv4 } from "uuid";
+import { resolveSessionId } from "../../utils/sessionManager.js";
 import {
   resolveKiroModel,
   isThinkingEnabled,
@@ -546,7 +547,7 @@ export function openaiToKiroRequest(model, body, stream, credentials) {
   const payload = {
     conversationState: {
       chatTriggerType: "MANUAL",
-      conversationId: uuidv4(),
+      conversationId: resolveSessionId({ headers: credentials?.rawHeaders, body, connectionId: credentials?.connectionId, scope: "kiro" }),
       currentMessage: {
         userInputMessage: {
           content: finalContent,