feat(infra): proto-to-graphql generator + debezium outbox connector

- M0: parse proto to generate Federation 2 subgraph SDL

- M0.5: Debezium Connect monitors 4 outbox tables

- docker-compose: extend Debezium profiles to default+p3+p4+p5+p6

- package.json: add proto:gen-graphql script

package.json

@@ -16,6 +16,7 @@
     "typecheck": "pnpm -r --no-bail run typecheck || true",
     "arch:scan": "tsx scripts/arch-scan/scanner.ts",
     "arch:query": "tsx scripts/arch-scan/query.ts",
+    "proto:gen-graphql": "tsx scripts/proto-to-graphql/generator.ts",
     "prepare": "husky"
   },
   "devDependencies": {