tsc only emits .ts -> .js; non-TypeScript assets like SQL migration
files don't make it into dist/ by default. The migration runner reads
*.sql from dist/db/migrations/ at runtime in production (relative to
the compiled migrate.js), so the missing files surface as a fatal
ENOENT on container startup.
Fix: small node script (scripts/copy-assets.mjs) using fs.cpSync,
invoked after tsc in the build script. Cross-platform, no new
dependencies. The script is in the Docker build context but not
copied into the runtime stage, so it doesn't bloat the final image.
Verified: pnpm build now produces dist/db/migrations/0001_positions.sql.
Scaffold mirrors tcp-ingestion conventions: ESM, strict TS, pnpm, vitest
with unit/integration split, ESLint flat config with no-floating-promises
+ no-misused-promises + import/no-restricted-paths (the new src/core/ →
src/domain/ boundary that protects Phase 1 from Phase 2 churn).
Core types in src/core/types.ts (Position, StreamRecord, DeviceState,
Metrics, AttributeValue) — Position is byte-equivalent to tcp-ingestion's
output. Codec in src/core/codec.ts implements sentinel reversal:
{__bigint:"..."} → bigint, {__buffer_b64:"..."} → Buffer, ISO timestamp
string → Date. CodecError surfaces malformed payload reasons with the
failing field named.
Config in src/config/load.ts (zod schema, all 13 env vars with defaults
and bounded numerics). Logger in src/observability/logger.ts matches
tcp-ingestion exactly: ISO timestamps, string level labels, pino-pretty
in development.
Postgres in src/db/: createPool with sane defaults and application_name,
connectWithRetry mirroring the ioredis retry pattern, a 30-line
migration runner using a schema_migrations table, and 0001_positions.sql
with the hypertable + (device_id, ts) unique index + ts DESC index.
Migration runner unit-tested against a mocked pg.Pool; the real
TimescaleDB round-trip is deferred to task 1.10 per spec.
Verification: typecheck, lint, build all clean; 73 unit tests passing
across 4 files. import/no-restricted-paths verified live by temporarily
adding a forbidden src/domain/ import.
julian