fix(storage): use factory for cross-repo routing to respect backend config

When routing issues to other repos (via contributor routing or --rig flag),
the code was hardcoding sqlite.New instead of using the storage factory.
This meant Dolt-configured repos would fail when receiving routed issues.

Changed two locations:
- Contributor routing (line 357): use factory.NewFromConfig
- createInRig --rig flag (line 789): use factory.NewFromConfig

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/bd/create.go

@@ -16,6 +16,7 @@ import (
 	"github.com/steveyegge/beads/internal/routing"
 	"github.com/steveyegge/beads/internal/rpc"
 	"github.com/steveyegge/beads/internal/storage"
+	"github.com/steveyegge/beads/internal/storage/factory"
 	"github.com/steveyegge/beads/internal/storage/sqlite"
 	"github.com/steveyegge/beads/internal/timeparsing"
 	"github.com/steveyegge/beads/internal/types"
@@ -353,10 +354,10 @@ var createCmd = &cobra.Command{
 				FatalError("failed to initialize target repo: %v", err)
 			}
 
-			// Open new store for target repo
-			targetDBPath := filepath.Join(targetBeadsDir, ".beads", "beads.db")
+			// Open new store for target repo using factory to respect backend config
+			targetBeadsDirPath := filepath.Join(targetBeadsDir, ".beads")
 			var err error
-			targetStore, err = sqlite.New(rootCtx, targetDBPath)
+			targetStore, err = factory.NewFromConfig(rootCtx, targetBeadsDirPath)
 			if err != nil {
 				FatalError("failed to open target store: %v", err)
 			}
@@ -785,9 +786,8 @@ func createInRig(cmd *cobra.Command, rigName, title, description, issueType stri
 		FatalError("%v", err)
 	}
 
-	// Open storage for the target rig
-	targetDBPath := filepath.Join(targetBeadsDir, "beads.db")
-	targetStore, err := sqlite.New(ctx, targetDBPath)
+	// Open storage for the target rig using factory to respect backend config
+	targetStore, err := factory.NewFromConfig(ctx, targetBeadsDir)
 	if err != nil {
 		FatalError("failed to open rig %q database: %v", rigName, err)
 	}