fix(zen): rebuild dist with batch mechanism restored (v3.44.2)

REGRESSION FIX - v3.44.1 Build Issue:
- v3.44.1 source code correctly restored batch mechanism
- v3.44.1 dist files incorrectly contained v3.44.0 code (no batching)
- Benchmark confirmed regression: 57.8/100 vs expected 69.4/100

This commit:
- Rebuilds dist files from current source (batch mechanism present)
- Verifies batch code: if (z>100) { B++; ... B--; }
- All 48 tests passing

Expected performance recovery after v3.44.2 publish:
- Overall: 69.4/100 (from 57.8/100)
- Wide Fanout: 336K ops/sec (from 300K)
- Massive Fanout: 35K ops/sec (from 33K)
- Single Write: 17.9M ops/sec (from 15.6M)

Author: shtse8

.changeset/ci-release-v3-44-2.md

@@ -0,0 +1,26 @@
+---
+'@sylphx/zen': patch
+---
+
+v3.44.2: Fix v3.44.1 build regression (republish with correct code)
+
+BUILD FIX - v3.44.1 Published Wrong Code:
+- v3.44.1 source code had batch mechanism restored (correct)
+- v3.44.1 dist files contained v3.44.0 code without batching (incorrect)
+- v3.44.2 rebuilds and republishes with correct source code
+
+PERFORMANCE VERIFICATION (v3.44.1 benchmark results):
+- Overall: 57.8/100 (should be 69.4/100 after v3.44.2)
+- Wide Fanout: 300K ops/sec (should be 336K ops/sec)
+- Massive Fanout: 33K ops/sec (should be 35K ops/sec)
+- Single Write: 15.6M ops/sec (should be 17.9M ops/sec)
+
+ROOT CAUSE:
+- CI build workflow didn't rebuild dist files before publishing
+- Published npm package contained stale v3.44.0 dist files
+- Batch mechanism is critical for 100+ observer performance
+
+FIX:
+- Rebuild dist files with current source code (batch mechanism restored)
+- Republish as v3.44.2 to ensure correct code is distributed
+- Future: Add build verification to CI publish workflow