fix(server): track renamed registered item keys

[pragnyanramtha]

Root cause

McpServer registered item update closures deleted entries using the original registration key captured at creation time. After a tool, prompt, resource, or resource template was renamed once, a second rename or later remove() still deleted the original key, leaving stale entries in the internal registries.

Change

Track the current registry key inside each registered item closure and update it when the item is renamed. Prompt handlers are regenerated with the current prompt name so validation errors also reflect the active name after a rename.

Focused regression coverage verifies repeated rename plus removal for registered tools, prompts, static resources, and resource templates.

Validation

• pnpm --filter @modelcontextprotocol/server test -- mcp.compat.test.ts
• pnpm --filter @modelcontextprotocol/server typecheck
• pnpm --filter @modelcontextprotocol/server lint
• git diff --check

Attempted the repository pre-push hook as well. It progressed through broad workspace checks but failed after ~9 minutes in packages/middleware/node build with tsdown exit status 134; the touched server package checks above passed.

[changeset-bot]

🦋 Changeset detected

Latest commit: 90525d4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
@modelcontextprotocol/server	Patch
@modelcontextprotocol/express	Patch
@modelcontextprotocol/fastify	Patch
@modelcontextprotocol/hono	Patch
@modelcontextprotocol/node	Patch

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commit: 90525d4

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