feat: Add player_configs feature and migrate user preferences

- Implemented player_configs table to store multiple player configurations per user.
- Migrated existing player settings from user_preferences to player_configs.
- Removed player-related columns from user_preferences.
- Added referral state fields to user for tracking referral rewards.
- Created migration scripts for database changes and data migration.
- Added test cases for app services and usage helpers.
- Introduced video job service interfaces and implementations.

install_player_configs.sql

@@ -0,0 +1,55 @@
+-- Quick install script for player_configs table
+-- Run this directly in your PostgreSQL database
+-- Usage: psql -d video_db -f install_player_configs.sql
+
+BEGIN;
+
+-- Create player_configs table
+CREATE TABLE IF NOT EXISTS player_configs (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID NOT NULL REFERENCES "user"(id) ON DELETE CASCADE,
+    name TEXT NOT NULL,
+    description TEXT,
+    autoplay BOOLEAN NOT NULL DEFAULT FALSE,
+    loop BOOLEAN NOT NULL DEFAULT FALSE,
+    muted BOOLEAN NOT NULL DEFAULT FALSE,
+    show_controls BOOLEAN NOT NULL DEFAULT TRUE,
+    pip BOOLEAN NOT NULL DEFAULT TRUE,
+    airplay BOOLEAN NOT NULL DEFAULT TRUE,
+    chromecast BOOLEAN NOT NULL DEFAULT TRUE,
+    is_active BOOLEAN NOT NULL DEFAULT TRUE,
+    is_default BOOLEAN NOT NULL DEFAULT FALSE,
+    created_at TIMESTAMP(3) WITHOUT TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP(3) WITHOUT TIME ZONE NOT NULL,
+    version BIGINT NOT NULL DEFAULT 1
+);
+
+-- Indexes
+CREATE INDEX IF NOT EXISTS idx_player_configs_user_id ON player_configs(user_id);
+CREATE INDEX IF NOT EXISTS idx_player_configs_is_default ON player_configs(is_default);
+CREATE INDEX IF NOT EXISTS idx_player_configs_user_default ON player_configs(user_id, is_default);
+
+-- Trigger to auto-update updated_at and version
+CREATE OR REPLACE FUNCTION update_player_configs_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = CURRENT_TIMESTAMP;
+    NEW.version = OLD.version + 1;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+DROP TRIGGER IF EXISTS trg_update_player_configs ON player_configs;
+
+CREATE TRIGGER trg_update_player_configs
+BEFORE UPDATE ON player_configs
+FOR EACH ROW
+EXECUTE FUNCTION update_player_configs_updated_at();
+
+COMMIT;
+
+-- Verify installation
+SELECT table_name, column_name, data_type
+FROM information_schema.columns
+WHERE table_name = 'player_configs'
+ORDER BY ordinal_position;