Add database optimise task (#3929)

* Add database optimise task
* Wrap errors
* US internationalisation
---------
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

pkg/sqlite/anonymise.go

@@ -58,7 +58,7 @@ func (db *Anonymiser) Anonymise(ctx context.Context) error {
 			func() error { return db.anonymiseStudios(ctx) },
 			func() error { return db.anonymiseTags(ctx) },
 			func() error { return db.anonymiseMovies(ctx) },
-			func() error { db.optimise(); return nil },
+			func() error { return db.Optimise(ctx) },
 		})
 	}(); err != nil {
 		// delete the database

pkg/sqlite/database.go

@@ -436,21 +436,28 @@ func (db *Database) RunMigrations() error {
 	}
 
 	// optimize database after migration
-	db.optimise()
+	err = db.Optimise(ctx)
+	if err != nil {
+		logger.Warnf("error while performing post-migration optimisation: %v", err)
+	}
 
 	return nil
 }
 
-func (db *Database) optimise() {
-	logger.Info("Optimizing database")
-	_, err := db.db.Exec("ANALYZE")
+func (db *Database) Optimise(ctx context.Context) error {
+	logger.Info("Optimising database")
+
+	err := db.Analyze(ctx)
 	if err != nil {
-		logger.Warnf("error while performing post-migration optimization: %v", err)
+		return fmt.Errorf("performing optimization: %w", err)
 	}
-	_, err = db.db.Exec("VACUUM")
+
+	err = db.Vacuum(ctx)
 	if err != nil {
-		logger.Warnf("error while performing post-migration vacuum: %v", err)
+		return fmt.Errorf("performing vacuum: %w", err)
 	}
+
+	return nil
 }
 
 // Vacuum runs a VACUUM on the database, rebuilding the database file into a minimal amount of disk space.
@@ -459,6 +466,12 @@ func (db *Database) Vacuum(ctx context.Context) error {
 	return err
 }
 
+// Analyze runs an ANALYZE on the database to improve query performance.
+func (db *Database) Analyze(ctx context.Context) error {
+	_, err := db.db.ExecContext(ctx, "ANALYZE")
+	return err
+}
+
 func (db *Database) ExecSQL(ctx context.Context, query string, args []interface{}) (*int64, *int64, error) {
 	wrapper := dbWrapper{}