chore: trips catch-up migration (0011) + docs for Komodo push-to-deploy

- prisma/migrations/0011_trips: trips table, trip_id on overrides, partial
  index — idempotent; matches DDL already applied to prod. Applied to
  personal_test (integration suite was failing on missing trips relation).
- README/CLAUDE.md: deployment is now push-to-deploy via Komodo
  (deploy-finance Procedure, Gitea webhook); compose command is fallback.
- README: migrations table completed through 0011; note that the container
  must only be reachable via Traefik (header-trust auth).

prisma/migrations/0011_trips/migration.sql

@@ -0,0 +1,21 @@
+-- Trips: group transactions (via transaction_overrides.trip_id) into named
+-- trips with analytics. Catch-up migration — this DDL was applied directly to
+-- the live DB when the feature shipped; idempotent so re-running is safe.
+
+CREATE TABLE IF NOT EXISTS trips (
+  id          SERIAL PRIMARY KEY,
+  owner_id    INTEGER NOT NULL REFERENCES participants(id),
+  name        VARCHAR(255) NOT NULL,
+  description TEXT,
+  start_date  DATE,
+  end_date    DATE,
+  color       VARCHAR(20) NOT NULL DEFAULT '#6366f1',
+  archived    BOOLEAN NOT NULL DEFAULT false,
+  created_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+ALTER TABLE transaction_overrides
+  ADD COLUMN IF NOT EXISTS trip_id INTEGER REFERENCES trips(id) ON DELETE SET NULL;
+
+CREATE INDEX IF NOT EXISTS idx_tx_overrides_trip_id
+  ON transaction_overrides (trip_id) WHERE trip_id IS NOT NULL;