add module and processor for interacting with SQLite DB

internal/common/module.go

@@ -2,6 +2,7 @@ package common
 
 import (
 	"context"
+	"database/sql"
 )
 
 type Module interface {
@@ -16,3 +17,7 @@ type KeyValueModule interface {
 	Get(key string) (any, error)
 	Set(key string, value any) error
 }
+
+type DatabaseModule interface {
+	Database() *sql.DB
+}