Restructure data layer (#2532)

* Add new txn manager interface
* Add txn management to sqlite
* Rename get to getByID
* Add contexts to repository methods
* Update query builders
* Add context to reader writer interfaces
* Use repository in resolver
* Tighten interfaces
* Tighten interfaces in dlna
* Tighten interfaces in match package
* Tighten interfaces in scraper package
* Tighten interfaces in scan code
* Tighten interfaces on autotag package
* Remove ReaderWriter usage
* Merge database package into sqlite

pkg/txn/transaction.go

@@ -0,0 +1,38 @@
+package txn
+
+import "context"
+
+type Manager interface {
+	Begin(ctx context.Context) (context.Context, error)
+	Commit(ctx context.Context) error
+	Rollback(ctx context.Context) error
+}
+
+type TxnFunc func(ctx context.Context) error
+
+func WithTxn(ctx context.Context, m Manager, fn TxnFunc) error {
+	var err error
+	ctx, err = m.Begin(ctx)
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		if p := recover(); p != nil {
+			// a panic occurred, rollback and repanic
+			_ = m.Rollback(ctx)
+			panic(p)
+		}
+
+		if err != nil {
+			// something went wrong, rollback
+			_ = m.Rollback(ctx)
+		} else {
+			// all good, commit
+			err = m.Commit(ctx)
+		}
+	}()
+
+	err = fn(ctx)
+	return err
+}