Fix ai-service Dockerfile: bake in drug_entities.json, override its path

coordination/WORK_SPLIT_2026-08-10.md

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+# Work split — 2026-08-10
+
+## Claude: deployment owner
+
+- Stop changing `apps/ai-service/rag/**` and `apps/ai-service/tests/**` after
+  finishing or handing off the currently open Aspirin precaution fix.
+- Own Dockerfiles, runtime environment/secrets wiring, Docker Compose app
+  services, web hosting, health checks, smoke test, rollback notes, and the
+  demo deployment.
+- Deployment paths: `infra/**`, app Dockerfiles, and deployment-only config.
+
+## Codex: RAG core owner
+
+- Own multi-query, hybrid dense/lexical retrieval, RRF fusion, parent/sibling
+  expansion, context packing, retrieval/output guardrails, tracing, and eval.
+- Core paths: `apps/ai-service/rag/**`, retrieval adapters and their tests.
+- Do not edit deployment files or `packages/ui/**` while Claude is working.
+
+## Collision rule
+
+- Do not modify a file currently changed by the other owner.
+- Before each commit, check `git status --short` and preserve all pre-existing
+  changes.
+- Keep deployment and core changes in separate commits.