chore: bump version to 1.1.9

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

CHANGELOG.md

@@ -73,6 +73,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Comprehensive input schema definitions
 - Security audit of parameter handling
 
+## [1.1.9] - 2026-04-30
+
+### Fixed
+- **Images returned as MCP image content type**: Updated binary file handling so image files (PNG, JPG, JPEG, GIF, WEBP, SVG) are returned as `{ type: "image", data: "<base64>", mimeType: "..." }` per the MCP 2025-11-25 spec for image content in tool results
+  - Non-image binary files (PDF, ZIP, DOCX, etc.) continue to use the embedded resource format `{ type: "resource", resource: { uri, mimeType, blob } }`
+
 ## [1.1.8] - 2026-04-30
 
 ### Fixed