Task 1.5 — Event-participation collections

Five collections + 10 relations + 5 composite unique constraints,
captured into snapshots/schema.yaml (now 105 KB, up from 53 KB).

Collections:
- events       — 11 fields incl. organization_id M2O, discipline enum
                  (rally / time-trial / regatta / trail-run / hike),
                  starts_at/ends_at required.
- classes      — 8 fields incl. event_id M2O, code unique within event.
- entries      — 11 fields incl. event_id/vehicle_id (nullable for foot
                  races) /class_id M2O, race_number, status enum with
                  8 lifecycle values, archive on `withdrawn`.
                  team_id deliberately omitted (Phase 2+).
- entry_crew   — junction with role enum
                  (pilot/co-pilot/navigator/mechanic/rider/runner/hiker).
- entry_devices — junction with optional assigned_user_id (panic button
                  body-wear); ON DELETE SET NULL on that field since
                  user removal shouldn't block the device record.

10 M2O relations wired, all ON DELETE RESTRICT except
entry_devices.assigned_user_id (SET NULL).

db-init/005_event_participation_unique_constraints.sql adds composite
UNIQUE on:
  events (organization_id, slug)
  classes (event_id, code)
  entries (event_id, race_number)
  entry_crew (entry_id, user_id)
  entry_devices (entry_id, device_id)

---

Destructive-apply incident (recovered):

First attempt at this task hit a real foot-gun. After creating the 5
collections via MCP, we ran `compose build && up -d`. The image rebuild
baked in the snapshot from task 1.4 (only 7 collections). Boot's
schema-apply step ran `directus schema apply --yes` against that stale
snapshot — saw the 5 new collections in the DB but not in the snapshot
— DELETED THEM, taking the constraints with them.

Recovery: re-created the 5 collections + 10 relations via MCP, ran the
ALTER TABLE statements directly via psql to restore the constraints,
ran schema:snapshot BEFORE any further restart so the YAML reflects
the live state. Documented the operator rule (never rebuild with
uncommitted schema changes) inline in the task spec and in the
directus wiki entity page (separate commit in trm/docs).

Phase 3 hardening on the radar: DIRECTUS_SCHEMA_APPLY_MODE env var
with auto/dry-run/skip modes so dev environments default to non-
destructive behavior.

ROADMAP marks 1.5 done. Phase 1 progress: 7/9 tasks complete (1.1–1.7);
1.8, 1.9 remain.

.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, 1.3, 1.4, 1.6, 1.7 done; 1.5, 1.8, 1.9 remaining)
+**Status:** 🟨 In progress (1.1–1.7 done; 1.8, 1.9 remaining)
 **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)
@@ -53,7 +53,7 @@ These rules govern every task. Any deviation must be discussed and documented as
 | 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) | 🟩 | pending user commit |
 | 1.4 | [Org-level catalog collections](./phase-1-slice-1-schema/04-org-catalog-collections.md) | 🟩 | pending user commit |
-| 1.5 | [Event-participation collections](./phase-1-slice-1-schema/05-event-participation-collections.md) | ⬜ | — |
+| 1.5 | [Event-participation collections](./phase-1-slice-1-schema/05-event-participation-collections.md) | 🟩 | pending user commit |
 | 1.6 | [Schema snapshot/apply tooling](./phase-1-slice-1-schema/06-snapshot-tooling.md) | 🟩 | pending user commit |
 | 1.7 | [Image build & entrypoint](./phase-1-slice-1-schema/07-image-and-dockerfile.md) | 🟩 | pending user commit |
 | 1.8 | [Gitea CI dry-run workflow](./phase-1-slice-1-schema/08-gitea-ci-dryrun.md) | ⬜ | — |