feat(examples): rename sample MCP servers

[Agent-Hellboy]

Summary

• Rename the bundled sample MCP server identities from language-based names to capability-based names: workspace-assistant-mcp, data-utility-mcp, and text-analysis-mcp.
• Expand the sample MCP surfaces with more useful tools, prompts, and resources: release-note and handoff flows for the workspace assistant, keyword/numeric summaries and a data-quality prompt for the data utility, and keyword extraction for text analysis.
• Update manifests, e2e defaults, adapter docs, contributor docs, governed-agent metadata, and sample runbooks to use the new names.

Validation

• MCP_RUNTIME_CONFIG_DIR=$(mktemp -d) git commit -m "feat(examples): rename sample MCP servers" pre-commit hooks: Gitleaks, go fmt, staticcheck, go vet, race-enabled Go unit tests, Go integration tests, generated-file drift.
• go test ./... -count=1 in examples/go-mcp-server.
• go test ./api/v1alpha1 ./internal/operator ./internal/agentadapter -count=1.
• go test ./internal/cli/server -run TestApplyDeployMetadataDefaults -count=1.
• go test ./pkg/metadata ./internal/cli/pipeline -count=1.
• cargo test --manifest-path examples/rust-mcp-server/Cargo.toml.
• python3 -c 'import ast, pathlib; ast.parse(pathlib.Path("examples/python-mcp-server/app.py").read_text())'.

[gemini-code-assist]

Code Review

This pull request renames the example MCP servers to capability-focused names—workspace-assistant-mcp, data-utility-mcp, and text-analysis-mcp—and updates all documentation, manifests, and tests accordingly. It also introduces new tools and prompts, such as release note drafting and data quality reviews. Feedback suggests clamping the limit parameter in the keyword extraction tool to prevent resource exhaustion and optimizing the numeric summary tool to calculate statistics in a single pass for improved efficiency.