v1.1.1 - Bug fixes for stdio concurrency, pagination, tasks and resou…

…rces

Fixes:
- mcp: accept empty text and blob resource contents (mark3labs#952)
- mcp: read the tasks/result payload from the top level (mark3labs#973)
- stdio: serve requests off the read loop so slow handlers no longer block reads (mark3labs#977)
- client: reset pagination cursors for each iterator traversal (mark3labs#985)
- server: validate x-mcp-header annotations on every tool registration path (mark3labs#986)