fix(ci): update nix vendorHash and fix integration test compilation

- Update default.nix vendorHash to match current go.mod dependencies
- Fix NewSQLiteStorage calls to include required context.Context parameter
- Rename duplicate runCmd to runGitCmd in routing_integration_test.go

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

default.nix

@@ -9,7 +9,7 @@ pkgs.buildGoModule {
   subPackages = [ "cmd/bd" ];
   doCheck = false;
   # Go module dependencies hash (computed via nix build)
-  vendorHash = "sha256-KRR6dXzsSw8OmEHGBEVDBOoIgfoZ2p0541T9ayjGHlI=";
+  vendorHash = "sha256-RJ8LMS2kdKvvkpsL7RcDnSyMfwsGKiMb/qpeLUvXZfA=";
 
   # Git is required for tests
   nativeBuildInputs = [ pkgs.git ];