docs(changelog): promote Unreleased to v1.1.0 (2026-05-29)

Completes the release flow for v1.1.0 (already merged via #31 with version
bumped to 1.1.0): dates the changelog section so the published release notes
match the tag. No code changes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: vdavez

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.1.0] - 2026-05-29
+
 ### Fixed
 - `_parse_webhook_alert`: aligned the parser output with the `WebhookAlert`
   type contract. Sparse server payloads now hydrate `query_type` and `filters`