feat(db): add similarity lookup queries (ListActiveContextualLikesForUser, GetCurrentSessionVectorForUser)

internal/db/dbq/events.sql.go

@@ -1,6 +1,6 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
-//   sqlc v1.31.1
+//   sqlc v1.27.0
 // source: events.sql
 
 package dbq
@@ -11,6 +11,26 @@ import (
 	"github.com/jackc/pgx/v5/pgtype"
 )
 
+const getCurrentSessionVectorForUser = `-- name: GetCurrentSessionVectorForUser :one
+SELECT pe.session_vector_at_play
+FROM play_events pe
+JOIN play_sessions s ON s.id = pe.session_id
+WHERE pe.user_id = $1
+  AND s.ended_at IS NULL
+ORDER BY pe.started_at DESC
+LIMIT 1
+`
+
+// Returns the session_vector_at_play of the user's most recent play_event
+// in a still-active (un-timed-out) session. NoRows means no current vector.
+// Joined with play_sessions so closed sessions don't leak stale vectors.
+func (q *Queries) GetCurrentSessionVectorForUser(ctx context.Context, userID pgtype.UUID) ([]byte, error) {
+	row := q.db.QueryRow(ctx, getCurrentSessionVectorForUser, userID)
+	var session_vector_at_play []byte
+	err := row.Scan(&session_vector_at_play)
+	return session_vector_at_play, err
+}
+
 const getMostRecentPlaySessionForUser = `-- name: GetMostRecentPlaySessionForUser :one
 SELECT id, user_id, started_at, ended_at, last_event_at, track_count, client_id FROM play_sessions
 WHERE user_id = $1