feat(claude-code): spoof TLS fingerprint and stabilize headers for Anthropic

- Add claudeHeaderCache.js to intercept and cache live Claude Code client headers
- Forward cached headers dynamically to api.anthropic.com via default.js
- Strip first-party identity headers (x-app, claude-code-* beta) for non-Anthropic upstreams
- Validate and sanitize tool call IDs to match Anthropic pattern (^[a-zA-Z0-9_-]+$)
- Skip thinking blocks when applying cache_control; fix max_tokens buffer (+1024)
- Strip cache_control from thinking blocks in openai-to-claude translator
- Comment out thoughtSignature in Gemini translator (kept for reference)
- Expand .gitignore to match all deploy*.sh variants

Co-authored-by: kwanLeeFrmVi <quanle96@outlook.com>
Closes #433

Made-with: Cursor

src/sse/handlers/chat.js

@@ -7,6 +7,7 @@ import {
   extractApiKey,
   isValidApiKey,
 } from "../services/auth.js";
+import { cacheClaudeHeaders } from "open-sse/utils/claudeHeaderCache.js";
 import { getSettings } from "@/lib/localDb";
 import { getModelInfo, getComboModels } from "../services/model.js";
 import { handleChatCore } from "open-sse/handlers/chatCore.js";
@@ -41,6 +42,7 @@ export async function handleChat(request, clientRawRequest = null) {
       headers: Object.fromEntries(request.headers.entries())
     };
   }
+  cacheClaudeHeaders(clientRawRequest.headers);
 
   // Log request endpoint and model
   const url = new URL(request.url);