docs(api): changelog entry for scan hot-loop perf in 1.29.0

Author: AdriiiPRodri

api/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All notable changes to the **Prowler API** are documented in this file.
 
+## [1.29.0] (Prowler v5.28.0)
+
+### 🔄 Changed
+
+- Scan finding ingestion: bulk-resolve `Resource`/`ResourceTag` rows, replace per-mapping `SELECT FOR UPDATE` with deferred `ResourceTagMapping.bulk_create(ignore_conflicts=True)`, wrap each micro-batch in a single `rls_transaction`, and raise `SCAN_DB_BATCH_SIZE` to 1000. Cuts wall-clock ~13x and `COMMIT` count by ~99% on large batches [(#11249)](https://github.com/prowler-cloud/prowler/pull/11249)
+
+---
+
 ## [1.28.0] (Prowler v5.27.0)
 
 ### 🚀 Added