feat(analysis): add type shape facts to symbols

[bntvllnt]

Summary

• add parser type/shape facts for exported/local symbols: signatures, parameters, return types, consumed/produced shapes, confidence
• propagate type facts through graph symbol nodes, file context, symbol context, search, CLI text formatters, and MCP/CLI JSON surfaces
• keep parser organization explicit with parser/type-facts.ts and parser/symbols.ts; preserve barrel re-export symbols in file context
• sync docs/llms/roadmap for the 2.5.0 Type/Shape foundation slice

Roadmap

• 2.5.0 / P1 Type/Shape Layer foundation slice
• CH-P1-03: parser -> graph -> core -> search -> CLI/MCP type/shape facts

Tests / Gates

• pnpm exec eslint src/types/index.ts src/parser/index.ts src/parser/type-facts.ts src/parser/symbols.ts src/graph/index.ts src/core/index.ts src/search/index.ts src/operations/formatters.ts tests/type-shape.test.ts tests/operation-registry.e2e.test.ts tests/phase1-red.test.ts
• pnpm typecheck
• pnpm build
• focused regression chain: 85 tests passed
• pnpm test: 32 files, 455 tests passed
• pnpm verify:cli-real: pass=56 fail=0
• git diff --check
• hygiene scan: no added any, as assertion, TS ignore, TS expect-error, or eslint-disable

Dogfood

• node dist/cli.js file tests/fixture-codebase/src auth/index.ts --json --force preserves barrel exports: AuthService, authenticate, requireAuth, etc.
• node dist/cli.js search tests/fixture-codebase/src CreateUserInput --limit 3 --json --force returns UserService.createUser with consumes: [CreateUserInput], produces: [User]
• codebase-intelligence changes . --json --force: 19 changed files, 37 affected files, 11 changed symbols

Code Review

• artifact: /tmp/code-review-type-shape-facts.json
• mode: Deep
• coverage: 75/75 hunks, 18/18 rules
• verdict: CLEAN