MCP-Tool to return detailed list of Changelog reactions

Description: The MCP Server currently returns changelog reactions as aggregate counts only (e.g. 👍 ×1), without exposing which users submitted each reaction. The REST API already supports this via GET /update/{updateid}/satisfaction, but this endpoint is not available as an MCP tool. Problem: When using Claude or any AI agent connected to Sleekplan via MCP, it is impossible to retrieve the list of users who reacted to a changelog entry. The getvoters tool only works for feedback posts (feedbackid required) and cannot be used for changelogs that have no linked feedback post. Benefit: Exposing GET /update/{updateid}/satisfaction as an MCP tool would allow teams to automatically identify engaged users after a release, personalize follow-ups, and measure changelog reception at a user level — directly from their AI workflows.