Update publish workflow, server schema, and README metadata

[jongalloway]

• Use check emoji for NuGet push and add MCP registry publish steps to CI
• Bump .mcp/server.json schema to 2025-10-17 and add "title" field
• Add mcp-name metadata comment to README

[Copilot]

Pull Request Overview

This PR updates CI/CD workflows and metadata to support publishing to the MCP Registry alongside existing NuGet publishing. The changes align with MCP registry publishing requirements by updating the server schema version, adding required metadata fields, and extending the publish workflow.

Key changes:

• Updates MCP server schema to latest version (2025-10-17) and adds required "title" field
• Extends publish workflow to include MCP Registry authentication and publishing steps
• Adds MCP registry identifier metadata comment to README

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
README.md	Adds mcp-name metadata comment for MCP registry identification
DotNetMcp/.mcp/server.json	Updates schema version and adds title field per MCP registry requirements
.github/workflows/publish-nuget.yml	Extends workflow with MCP registry login and publish steps

[Copilot]

Downloading and executing binaries from external sources without verification poses a security risk. Add checksum verification or pin to a specific release version instead of using 'latest' to ensure reproducibility and security.

Suggested change

	run: |
	curl -L "https://github.com/modelcontextprotocol/registry/releases/latest/download/mcp-publisher_$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/').tar.gz" | tar xz mcp-publisher
	env:
	MCP_PUBLISHER_VERSION: v0.4.0
	run: |
	set -e
	OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
	ARCH="$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/')"
	TARBALL="mcp-publisher_${OS}_${ARCH}.tar.gz"
	CHECKSUM_FILE="${TARBALL}.sha256"
	BASE_URL="https://github.com/modelcontextprotocol/registry/releases/download/${MCP_PUBLISHER_VERSION}"
	echo "Downloading MCP Publisher $MCP_PUBLISHER_VERSION for $OS/$ARCH"
	curl -fsSL -o "$TARBALL" "$BASE_URL/$TARBALL"
	curl -fsSL -o "$CHECKSUM_FILE" "$BASE_URL/$CHECKSUM_FILE"
	echo "Verifying checksum..."
	sha256sum -c "$CHECKSUM_FILE"
	tar xzvf "$TARBALL" mcp-publisher

[Copilot]

The tar extraction command is missing the '-C' flag to specify extraction directory, and 'mcp-publisher' at the end appears to be attempting to filter archive members but is incorrect syntax. Use 'tar xz -C . mcp-publisher' or 'tar xz ./mcp-publisher' to properly extract the binary.

Suggested change

	curl -L "https://github.com/modelcontextprotocol/registry/releases/latest/download/mcp-publisher_$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/').tar.gz" | tar xz mcp-publisher
	curl -L "https://github.com/modelcontextprotocol/registry/releases/latest/download/mcp-publisher_$(uname -s | tr '[:upper:]' '[:lower:]')_$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/').tar.gz" | tar xz -C . mcp-publisher