refactor(store): clarify key-value terminology

Co-Authored-By: Virgil <virgil@lethean.io>

doc.go

@@ -1,4 +1,4 @@
-// Package store provides SQLite-backed storage for grouped entries, TTL expiry,
+// Package store provides SQLite-backed key-value storage for grouped entries, TTL expiry,
 // namespace isolation, quota enforcement, reactive change notifications,
 // workspace journalling, and explicit orphan recovery.
 //

store.go

@@ -72,6 +72,8 @@ func (journalConfig journalConfiguration) isConfigured() bool {
 		journalConfig.bucketName != ""
 }
 
+// Store is the SQLite key-value store with optional journal backing.
+//
 // Usage example: `storeInstance, err := store.New(":memory:")`
 type Store struct {
 	sqliteDatabase       *sql.DB