Title sanitization returns HTML entities in tool output

[SamMorrowDrums]

Describe the bug

GitHub MCP title fields can return HTML entity text instead of the original visible characters. For example, an issue titled [bug] can't add a connection to toolkits in desktop app was returned as [bug] can't add a connection to toolkits in desktop app.

This affects short metadata handled by the strict title sanitizer and is separate from Markdown body fidelity work in #3177.

Affected version

Not provided; reported against the current GitHub MCP service.

Steps to reproduce the behavior

1. Create or read an issue whose title contains an apostrophe, such as [bug] can't add a connection to toolkits in desktop app.
2. Retrieve the issue through the GitHub MCP server.
3. Observe that the returned title contains ' instead of '.

Expected vs actual behavior

Expected: the returned title preserves visible text as [bug] can't add a connection to toolkits in desktop app while remaining safe for tool consumers.

Actual: the returned title contains the encoded entity [bug] can't add a connection to toolkits in desktop app.

Logs

N/A. Originally reported in #3177 (comment).