stitchkit v0.112.3

Fixed

• stitchkit/tools/mcp, stitchkit/tools/connections — a tool whose input holds a z.tuple is now served as a valid 2020-12 schema: the tuple is written as prefixItems (rest as items) instead of draft-07's items list, which Claude's MCP client refused (must be object,boolean) and dropped the tool without a server-side error. The stitchkit MCP client reads a tuple from an older server's document with the same meaning. → ADR 0270
  Affects: stitchkit/tools/mcp behaviour; stitchkit/tools/connections behaviour