fix(db): add CHECK constraints, UNIQUE, and asset_id index to sequences schema

services/mam-api/src/db/schema_patch_editor.sql

@@ -1,5 +1,5 @@
--- services/mam-api/src/db/schema_patch_editor.sql
--- Run once against the Wild Dragon PostgreSQL database.
+-- Wild Dragon MAM – Editor sequences schema patch
+-- Run with: psql $DATABASE_URL -f schema_patch_editor.sql
 
 -- Named timelines within a project (multiple per project, like Premiere)
 CREATE TABLE IF NOT EXISTS sequences (
@@ -10,7 +10,8 @@ CREATE TABLE IF NOT EXISTS sequences (
   width       INTEGER NOT NULL DEFAULT 1920,
   height      INTEGER NOT NULL DEFAULT 1080,
   created_at  TIMESTAMPTZ DEFAULT NOW(),
-  updated_at  TIMESTAMPTZ DEFAULT NOW()
+  updated_at  TIMESTAMPTZ DEFAULT NOW(),
+  CONSTRAINT uq_sequences_project_name UNIQUE (project_id, name)
 );
 
 CREATE INDEX IF NOT EXISTS idx_sequences_project_id ON sequences(project_id);
@@ -21,15 +22,40 @@ CREATE TABLE IF NOT EXISTS sequence_clips (
   id                   UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
   sequence_id          UUID NOT NULL REFERENCES sequences ON DELETE CASCADE,
   asset_id             UUID NOT NULL REFERENCES assets ON DELETE CASCADE,
-  track                INTEGER NOT NULL DEFAULT 0,
+  track                INTEGER NOT NULL DEFAULT 0 CHECK (track >= 0),
   -- track encoding: 0=V1, 1=V2, 100=A1, 101=A2
+  -- Open-ended CHECK (track >= 0) used instead of an enumerated list so that
+  -- additional tracks can be added in the future without a schema migration.
   timeline_in_frames   BIGINT NOT NULL,
   timeline_out_frames  BIGINT NOT NULL,
   source_in_frames     BIGINT NOT NULL DEFAULT 0,
   source_out_frames    BIGINT NOT NULL,
   created_at           TIMESTAMPTZ DEFAULT NOW(),
-  updated_at           TIMESTAMPTZ DEFAULT NOW()
+  updated_at           TIMESTAMPTZ DEFAULT NOW(),
+  CONSTRAINT chk_timeline_range CHECK (timeline_out_frames > timeline_in_frames),
+  CONSTRAINT chk_source_range   CHECK (source_out_frames > source_in_frames)
 );
 
-CREATE INDEX IF NOT EXISTS idx_sequence_clips_sequence_id ON sequence_clips(sequence_id);
+CREATE INDEX IF NOT EXISTS idx_sequence_clips_sequence_id    ON sequence_clips(sequence_id);
 CREATE INDEX IF NOT EXISTS idx_sequence_clips_track_position ON sequence_clips(sequence_id, track, timeline_in_frames);
+CREATE INDEX IF NOT EXISTS idx_sequence_clips_asset_id       ON sequence_clips(asset_id);
+
+-- ---------------------------------------------------------------------------
+-- Idempotent ALTER TABLE block — applies the new constraints and index to
+-- tables that were already created by an earlier run of this file.
+-- Safe to re-run: ADD CONSTRAINT IF NOT EXISTS / CREATE INDEX IF NOT EXISTS.
+-- ---------------------------------------------------------------------------
+
+ALTER TABLE sequences
+  ADD CONSTRAINT IF NOT EXISTS uq_sequences_project_name UNIQUE (project_id, name);
+
+ALTER TABLE sequence_clips
+  ADD CONSTRAINT IF NOT EXISTS chk_timeline_range CHECK (timeline_out_frames > timeline_in_frames);
+
+ALTER TABLE sequence_clips
+  ADD CONSTRAINT IF NOT EXISTS chk_source_range CHECK (source_out_frames > source_in_frames);
+
+ALTER TABLE sequence_clips
+  ADD CONSTRAINT IF NOT EXISTS chk_track_valid CHECK (track >= 0);
+
+CREATE INDEX IF NOT EXISTS idx_sequence_clips_asset_id ON sequence_clips(asset_id);