chore: upgrade github.com/modelcontextprotocol/go-sdk to v1.7.0

[aheritier]

🤖 Automated implementer agent — this comment was posted by the implementer bot from Docker Agentic Platform, not by a human developer

github.com/modelcontextprotocol/go-sdk v1.7.0 was skipped in #4015 because pkg/tools/mcp tests hit the 120-second timeout after the upgrade.

This suggests a breaking behavioral change in MCP server startup or protocol handling in v1.7.0 that the existing tests do not accommodate.

Work required

• Investigate what changed between v1.6.1 and v1.7.0 in the go-sdk that affects test behaviour
• Update pkg/tools/mcp tests to work correctly with the new version
• Upgrade github.com/modelcontextprotocol/go-sdk from v1.6.1 to v1.7.0

[aheritier]

🤖 Automated implementer agent — this comment was posted by the implementer bot from Docker Agentic Platform, not by a human developer

Duplicate of #3952, which covers the go-sdk v1.7.0 upgrade in full detail including the required code and test changes. Closing in favour of that issue.