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.

internal/video/interfaces.go

@@ -0,0 +1,34 @@
+package video
+
+import (
+	"context"
+
+	runtimedomain "stream.api/internal/video/runtime/domain"
+	runtimeservices "stream.api/internal/video/runtime/services"
+)
+
+type Job = runtimedomain.Job
+
+type AgentWithStats = runtimeservices.AgentWithStats
+
+type PaginatedJobs = runtimeservices.PaginatedJobs
+
+var ErrInvalidJobCursor = runtimeservices.ErrInvalidJobCursor
+
+type JobService interface {
+	CreateJob(ctx context.Context, userID string, videoID string, name string, config []byte, priority int, timeLimit int64) (*Job, error)
+	ListJobs(ctx context.Context, offset, limit int) (*PaginatedJobs, error)
+	ListJobsByAgent(ctx context.Context, agentID string, offset, limit int) (*PaginatedJobs, error)
+	ListJobsByCursor(ctx context.Context, agentID string, cursor string, pageSize int) (*PaginatedJobs, error)
+	GetJob(ctx context.Context, id string) (*Job, error)
+	CancelJob(ctx context.Context, id string) error
+	RetryJob(ctx context.Context, id string) (*Job, error)
+	SubscribeJobLogs(ctx context.Context, jobID string) (<-chan runtimedomain.LogEntry, error)
+	SubscribeJobUpdates(ctx context.Context) (<-chan string, error)
+	SubscribeSystemResources(ctx context.Context) (<-chan runtimedomain.SystemResource, error)
+}
+
+type AgentRuntime interface {
+	ListAgentsWithStats() []*AgentWithStats
+	SendCommand(agentID string, cmd string) bool
+}