refactor(operations): move CLI text formatting into descriptors

[bntvllnt]

Summary

• move CLI human-text formatting into descriptor-backed operation formatters
• keep CLI JSON output and MCP success/error envelopes unchanged
• add chained CLI text parity coverage for every registered operation
• update architecture docs and 2.5.0 roadmap status

Roadmap

• 2.5.0 / P1 Operation Registry: formatter migration completed

Review

• Code-review artifact: /tmp/code-review-operation-formatters.json
• Verdict: CLEAN
• Hunks: 53/53 reviewed
• Relevant rules: 12/12 checked

Validation

• pnpm exec eslint src/operations/formatters.ts src/operations/index.ts src/cli.ts src/mcp/index.ts tests/operation-registry.test.ts tests/operation-registry.e2e.test.ts
• pnpm typecheck
• pnpm build
• pnpm exec vitest run --no-cache --pool threads --no-file-parallelism --maxWorkers=1 tests/operation-registry.test.ts tests/operation-registry.e2e.test.ts
• pnpm test
• pnpm verify:cli-real
• git diff --cached --check
• node dist/cli.js changes . --json --force
• node dist/cli.js dependents . src/operations/formatters.ts --json --force
• node dist/cli.js dependents . src/operations/index.ts --json --force
• node dist/cli.js hotspots . --metric complexity --limit 8 --json --force
• local dogfood: node dist/cli.js overview tests/fixture-codebase/src --force
• local dogfood: node dist/cli.js hotspots tests/fixture-codebase/src --metric coupling --limit 3 --force