fix: Address review findings (CRITICAL/HIGH)

CRITICAL fixes:
- Stop passing mint URLs as relay URLs in initNDK (protocol mismatch)
- Add unit tests for buildTransactionHistory (dedup, fallback, sort)

HIGH fixes:
- Restore .claude entry in .gitignore
- Add warning logging for skipped malformed proof tags in nutzap parsing
- Add error handling + 30s timeout to NDK initialization
- Add unit tests for formatCSV and escapeField
- Export escapeField for testability

Also: add test script to package.json, include test/ in tsconfig

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/index.ts

@@ -35,8 +35,8 @@ async function main() {
       ? args[mintsIdx + 1].split(",").filter(Boolean)
       : [];
 
-  // Initialize NDK
-  const { ndk, signer, user } = await initNDK(secretKey, extraMints);
+  // Initialize NDK (don't pass mints as relays — they use different protocols)
+  const { ndk, signer, user } = await initNDK(secretKey);
 
   // Fetch wallet data first (need mints for context)
   const walletData = await fetchWalletData(ndk, user, signer);