Task 1.3 — Initial migrations

Three SQL files under db-init/ create the schema processor writes
against. All three apply cleanly via apply-db-init.sh, are idempotent
on re-run, and end with assertion blocks that catch silent
schema drift.

001_extensions.sql — registers timescaledb on the directus database.
  PostGIS deferred to Phase 2 (per Plan A). The timescaledb-ha image
  pre-creates the extension at DB init, so the IF NOT EXISTS guard
  fires as a NOTICE — expected and harmless.

002_positions_hypertable.sql — positions hypertable, exact
  column-by-column match against processor/src/db/migrations/0001_positions.sql.

  Cross-checking against processor surfaced 8 divergences from the
  original task spec; processor wins in every case (it is the writer
  and is in production). The corrections:

    - added ingested_at timestamptz NOT NULL DEFAULT now()
    - added codec text NOT NULL
    - altitude/angle/speed: real NOT NULL (not DOUBLE PRECISION nullable)
    - satellites/priority: NOT NULL
    - removed attributes DEFAULT '{}'::jsonb (processor always writes)
    - replaced PRIMARY KEY with UNIQUE INDEX positions_device_ts
      (idiomatic for TimescaleDB hypertables)
    - chunk interval 1 day, not 7 days
    - two indexes (positions_device_ts + positions_ts), not one composite

  Without these corrections every processor INSERT would have failed
  with NOT NULL violations. Spec deliverables section updated to
  reflect the correct shape so future readers see the right schema.

003_faulty_column.sql — adds the operator-controlled faulty boolean
  flag plus the partial index positions_faulty_idx ON (device_id,
  ts DESC) WHERE faulty = FALSE. The column is set only via Directus
  admin (Phase 4 permissions); processor's writer never touches it.
  The partial index optimises the hot-path read pattern (every
  processor evaluator filters faulty = FALSE); operator queries that
  look at faulty rows specifically use the broader positions_device_ts
  index from 002.

Live-verified 2026-05-01:
  - First apply: 3 applied, 0 skipped, exit 0.
  - Re-run: 0 applied, 3 skipped, exit 0.
  - All 13 columns present with correct types/nullability/defaults.
  - Hypertable registered with 1-day chunk interval.
  - Three expected indexes present.

Non-blocking observation: TimescaleDB's create_hypertable()
auto-created a fourth index (positions_ts_idx) duplicating our
explicit positions_ts. Processor's migration has the same redundancy
so stage already lives with this. Cleanup path documented in the
task spec for Phase 3 hardening (create_default_indexes => FALSE
in the create_hypertable call).

ROADMAP marks 1.3 done; 1.4 next.

.planning/ROADMAP.md

@@ -42,7 +42,7 @@ These rules govern every task. Any deviation must be discussed and documented as
 
 ### Phase 1 — Slice 1 schema + deploy pipeline
 
-**Status:** 🟨 In progress (1.1, 1.2 done; 1.3 next)
+**Status:** 🟨 In progress (1.1, 1.2, 1.3 done; 1.4 next)
 **Outcome:** A Directus instance with the org-level catalog (orgs, users, organization_users, vehicles, devices and their org junctions) and event-participation collections (events, classes, entries, entry_crew, entry_devices) live and snapshot-tracked. `db-init/` covers the TimescaleDB extension, the `positions` hypertable, and the `faulty` column. Image builds via Gitea Actions with a CI dry-run that catches snapshot drift before deploy. Rally Albania 2026 is registered as the first event in admin UI to dogfood the registration workflow. **This is what Rally Albania 2026 needs.**
 
 [**See `phase-1-slice-1-schema/README.md`**](./phase-1-slice-1-schema/README.md)
@@ -51,7 +51,7 @@ These rules govern every task. Any deviation must be discussed and documented as
 |---|------|--------|-----------|
 | 1.1 | [Project scaffold](./phase-1-slice-1-schema/01-project-scaffold.md) | 🟩 | pending user commit |
 | 1.2 | [db-init runner script](./phase-1-slice-1-schema/02-db-init-runner.md) | 🟩 | pending user commit |
-| 1.3 | [Initial migrations (extensions, positions hypertable, faulty column)](./phase-1-slice-1-schema/03-initial-migrations.md) | ⬜ | — |
+| 1.3 | [Initial migrations (extensions, positions hypertable, faulty column)](./phase-1-slice-1-schema/03-initial-migrations.md) | 🟩 | pending user commit |
 | 1.4 | [Org-level catalog collections](./phase-1-slice-1-schema/04-org-catalog-collections.md) | ⬜ | — |
 | 1.5 | [Event-participation collections](./phase-1-slice-1-schema/05-event-participation-collections.md) | ⬜ | — |
 | 1.6 | [Schema snapshot/apply tooling](./phase-1-slice-1-schema/06-snapshot-tooling.md) | ⬜ | — |