fix: post-monorepo-migration cleanup (compose + script)

[chase2955]

Summary

Two regressions discovered while validating a fresh clone of
EVNSolution/clever-msa-platform end-to-end through this repo. Both
originate from the 1cc4008 refactoring: convert msa platform to monorepo umbrella commit on clever-msa-platform, are bundled here
because they share a root cause and the same review axis: a fresh
clone must boot through seed-runner completed successfully and
reach gateway healthy at http://127.0.0.1:8080/healthz.

Commit 1 — compose: add attendance-registry-api + db + env

development/service-attendance-registry/ exists in
clever-msa-platform (whitelisted in WORKSPACE.md, listed in
docs/mappings/current-runtime-inventory.md as active runtime), but
attendance-registry-api is absent from
docker-compose.account-driver-settlement.yml and there is no
infra/env/local/attendance-registry.env.example. Yet
development/edge-api-gateway/nginx.conf declares
upstream attendance-registry-api. On a fresh clone the gateway
container therefore fails to start with:

[emerg] host not found in upstream "attendance-registry-api" in /etc/nginx/nginx.conf:290

Mirroring the closest sibling stanza (dispatch-registry-api), this
commit adds:

• attendance-registry-api service (build context
  ../service-attendance-registry, depends on
  attendance-registry-db and dispatch-registry-api — phase-1
  attendance source per the service README)
• attendance-registry-db postgres stanza
• infra/env/local/attendance-registry.env.example matching sibling
  shape (Django + Postgres + JWT + DISPATCH_REGISTRY_BASE_URL +
  DRIVER_PROFILE_BASE_URL)

Commit 2 — scripts: inventory heading drift in build_unified_openapi.py

scripts/build_unified_openapi.py:172 parses
docs/mappings/current-runtime-inventory.md looking for a heading
## Active Runtime Repos, but on main of clever-msa-platform the
canonical heading reads ## Active Runtime Source Slices. As a result
scripts/refresh_api_docs.py fails at the enabled_services step:

ValueError: Heading not found: ## Active Runtime Repos in /home/.../current-runtime-inventory.md

This blocks generating
development/edge-api-gateway/public-api-docs/openapi.yaml,
revision.json, and service-export-manifest.json, which the
gateway Dockerfile requires via RUN test -f. Fresh-clone gateway
image builds therefore fail until the heading lookup is aligned.

Single-line fix: align the lookup with the canonical heading in
inventory.

Verified locally

After both commits applied:

• docker compose -f docker-compose.account-driver-settlement.yml build attendance-registry-api succeeds.
• docker compose ... up -d attendance-registry-db attendance-registry-api reaches Up healthy with Django migrations applied and gunicorn workers booting.
• gateway container transitions from unhealthy/exit to Up healthy.
• curl -i http://127.0.0.1:8080/healthz → 200 OK.
• curl -i http://127.0.0.1:8080/api/auth/health/ → 200 OK.
• seed-runner reaches Seed runner completed successfully.

Trace

Discovered during fresh-clone validation for
EVNSolution/clever-change-control#23 (체이스운수 운영현황·정산·전자계산서
역발행 시스템). A consolidated audit covering all four monorepo-migration
regressions (two more in clever-msa-platform itself, addressed in
EVNSolution/clever-msa-platform#3) is being filed on
clever-change-control with cross-links to this PR.

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