fix(Srv/stream): add ID field to `PingRequest` (#353)

* fix(Srv/stream): add ID field to PingRequest

* fix: make session requestID unique and incremental

fix(server): Implement MCP protocol negotiation. (#341)

According to [the MCP spec](https://modelcontextprotocol.io/specification/2025-03-26/basic/lifecycle#version-negotiation):

> If the server supports the requested protocol version, it MUST respond with
> the same version. Otherwise, the server MUST respond with another protocol
> version it supports.

This adds `mcp.ValidProtocolVersions`, a slice with all currently specified MCP
versions.

In the `server` package we check if the client provided a known MCP version
and, if so, return that version. Otherwise `LATEST_PROTOCOL_VERSION` is
returned as previously.

Formatting

Release v0.29.0

feat(MCPServer): support `logging/setlevel` request (#276)

* feat(MCPServer): support logging/setlevel request

* update template file and adopt coderabbitai suggestion

fix(session): Don't send tool changed notifications if session not in…

…itialized yet (#289)

AddSessionTools and DeleteSessionTools can be called before the session
is registered, in particular in the RegisterSession hook.

They should not attempt to send `notifications/tools/list_changed`
notifications in this case as it will only generate errors.

Release v0.27.0

Format

Format

fix(client/test): verify mock server binary exists after compilation (#…

…215)

Add explicit check to confirm the compiled mock server binary actually
exists at the expected path after compilation, providing a more helpful
error message if the binary is missing.