Fix Dolt backend init/daemon/doctor; prevent accidental SQLite artifacts; add integration tests; clean up lint (#1218)

* /{cmd,internal}: get dolt backend init working and allow issue creation

* /{website,internal,docs,cmd}: integration tests and more split backend fixes

* /{cmd,internal}: fix lint issues

* /cmd/bd/doctor/integrity.go: fix unable to query issues bug with dolt backend

* /cmd/bd/daemon.go: remove debug logging

cmd/bd/doctor/backend.go

@@ -0,0 +1,19 @@
+package doctor
+
+import (
+	"path/filepath"
+
+	"github.com/steveyegge/beads/internal/configfile"
+)
+
+// getBackendAndBeadsDir resolves the effective .beads directory (following redirects)
+// and returns the configured storage backend ("sqlite" by default, or "dolt").
+func getBackendAndBeadsDir(repoPath string) (backend string, beadsDir string) {
+	beadsDir = resolveBeadsDir(filepath.Join(repoPath, ".beads"))
+
+	cfg, err := configfile.Load(beadsDir)
+	if err != nil || cfg == nil {
+		return configfile.BackendSQLite, beadsDir
+	}
+	return cfg.GetBackend(), beadsDir
+}