feat(playevents): add Writer with start/end/skipped/synthetic paths

Owns the auto-close-prior step (caps each user at one open row),
spec §6 skip classification rule on play_ended (AND of completion <
0.5 and duration_played < 30s), and skip_events row writes. Synthetic
completed play wires the Subsonic /rest/scrobble?submission=true path
into the same store as native events.

internal/db/dbq/albums.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 // source: albums.sql
 
 package dbq

internal/db/dbq/artists.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 // source: artists.sql
 
 package dbq

internal/db/dbq/db.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 
 package dbq
 

internal/db/dbq/models.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 
 package dbq
 
@@ -29,6 +29,31 @@ type Artist struct {
 	UpdatedAt pgtype.Timestamptz
 }
 
+type PlayEvent struct {
+	ID                  pgtype.UUID
+	UserID              pgtype.UUID
+	TrackID             pgtype.UUID
+	SessionID           pgtype.UUID
+	StartedAt           pgtype.Timestamptz
+	EndedAt             pgtype.Timestamptz
+	DurationPlayedMs    *int32
+	CompletionRatio     *float64
+	WasSkipped          bool
+	ClientID            *string
+	SessionVectorAtPlay []byte
+	ScrobbledAt         pgtype.Timestamptz
+}
+
+type PlaySession struct {
+	ID          pgtype.UUID
+	UserID      pgtype.UUID
+	StartedAt   pgtype.Timestamptz
+	EndedAt     pgtype.Timestamptz
+	LastEventAt pgtype.Timestamptz
+	TrackCount  int32
+	ClientID    *string
+}
+
 type Session struct {
 	ID         pgtype.UUID
 	UserID     pgtype.UUID
@@ -38,6 +63,15 @@ type Session struct {
 	LastSeenAt pgtype.Timestamptz
 }
 
+type SkipEvent struct {
+	ID         pgtype.UUID
+	UserID     pgtype.UUID
+	TrackID    pgtype.UUID
+	SessionID  pgtype.UUID
+	SkippedAt  pgtype.Timestamptz
+	PositionMs int32
+}
+
 type Track struct {
 	ID          pgtype.UUID
 	Title       string

internal/db/dbq/sessions.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 // source: sessions.sql
 
 package dbq

internal/db/dbq/tracks.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 // source: tracks.sql
 
 package dbq

internal/db/dbq/users.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.27.0
+//   sqlc v1.31.1
 // source: users.sql
 
 package dbq