feat: [Phase 4] dbt operations + local testing in TypeScript

[anandgupta42]

Phase 4: dbt + Local Testing

Parent: #214
Depends on: Phase 1 + Phase 2

What

Migrate remaining dbt methods and local testing module from Python to TypeScript.

Sub-tasks

• native/dbt/runner.ts — wraps dbt-tools or spawns dbt CLI
• native/dbt/manifest.ts — JSON parse target/manifest.json
• native/dbt/lineage.ts — manifest + altimateCore.columnLineage()
• native/dbt/profiles.ts — YAML parse ~/.dbt/profiles.yml
• native/local/schema-sync.ts — replicate schema to local DuckDB
• native/local/test-local.ts — transpile + execute against local DuckDB
• Register 7 dispatcher methods (4 dbt + 2 local + ping)
• dbt runner test with fixture project
• Manifest parsing test with fixture JSON

[anandgupta42]

Completed in PR #221.