FEAT: Discovery Video Service Subscription

discovery/internal/db/repositories/errors.go

@@ -0,0 +1,9 @@
+package repositories
+
+import "errors"
+
+// Sentinel errors the repositories return so handlers can tell "there is no
+// such row" from "the query failed", without importing database/sql to do it.
+
+// ErrVideoNotFound reports that the catalogue holds no video with that id.
+var ErrVideoNotFound = errors.New("video not found")