fix: always force-exit after analyze to avoid KuzuDB destructor crash

[lehenbauer]

Summary

• npx gitnexus analyze crashes under some circumstances with "double free or corruption (out)" or "munmap_chunk(): invalid pointer" on Node 22+
• KuzuDB 0.11.3's native atexit hooks corrupt the heap during natural process shutdown
• The existing process.exit(0) workaround was conditional on --embeddings being enabled; without it (the default), the process exits naturally and hits the crash

Fix

Always call process.exit(0) after successful completion, since KuzuDB is always loaded. One-line change (removes the if (!embeddingSkipped) guard).

Root cause analysis

KuzuDB 0.11.3's C++ destructors registered via atexit conflict with Node 22's V8 shutdown sequence. Minimal reproducer:

```js
const kuzu = require('kuzu');
const db = new kuzu.Database('/tmp/test');
const conn = new kuzu.Connection(db);
await conn.query('CREATE NODE TABLE IF NOT EXISTS T(id STRING, PRIMARY KEY(id))');
await conn.close();
await db.close();
// Process exits naturally → segfault
```

This happens regardless of tree-sitter or worker threads — it's purely KuzuDB 0.11.3 + Node 22.

Test plan

• `gitnexus analyze --force` completes cleanly on Node 22.22.0 (exit code 0, no crash)
• Worker pool path works (15.6s vs 50s sequential)
• Verified crash does not occur with `process.exit(0)`
• Verified `embeddingSkipped` variable is still used in summary output (no unused var)

🤖 Generated with Claude Code

[vercel]

@lehenbauer is attempting to deploy a commit to the NexusCore Team on Vercel.

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[magyargergo]

⚠️ Upcoming Prettier formatting — rebase instructions

PR #563 adds Prettier as the code formatter for the repo. When it merges, the bulk format commit will touch ~350 files (style-only: whitespace, quotes, trailing commas). Your branch will likely conflict.

After #563 merges, rebase your branch:

git fetch origin
git checkout <your-branch>
git rebase origin/main

# Conflicts will be formatting-only — accept your version:
git checkout --theirs .
git add .
git rebase --continue

# Then re-format your branch to match the new style:
npx prettier --write .
git add -A
git commit -m "style: apply prettier formatting"
git push --force-with-lease

New setup step: Run npm install at the repo root (not just in gitnexus/) to get prettier + activate the pre-commit hook. The hook auto-formats staged files on every commit going forward.

[magyargergo]

Please submit a new PR if this is still relevant