refactor: split dbx package into domain files

Reorganize monolithic dbx.go and utility.go into focused files by
concern, add package doc.go, and gitignore coverage.out.

Co-authored-by: Cursor <cursoragent@cursor.com>

dest.go

@@ -0,0 +1,38 @@
+package dbx
+
+import (
+	"reflect"
+	"strings"
+
+	"gitea.auvem.com/go-toolkit/dbx/internal/dbxshared"
+)
+
+// DestName returns the name of the type passed as `destTypeStruct` as a string,
+// normalized for compatibility with the Jet QRM.
+func DestName(destTypeStruct any, path ...string) string {
+	v := reflect.ValueOf(destTypeStruct)
+	for v.Kind() == reflect.Pointer {
+		v = v.Elem()
+	}
+
+	destIdent := v.Type().String()
+	destIdent = destIdent[strings.LastIndex(destIdent, ".")+1:]
+
+	for i, p := range path {
+		if v.Kind() != reflect.Struct {
+			dbxshared.DBModule.Logger().Error("DestName: path parent is not a struct", "path", destIdent+"."+strings.Join(path[:i+1], "."))
+			return ""
+		}
+
+		v = v.FieldByName(p)
+
+		if !v.IsValid() {
+			dbxshared.DBModule.Logger().Error("DestName: field does not exist", "path", destIdent+"."+strings.Join(path[:i+1], "."))
+			return ""
+		}
+
+		destIdent += "." + p
+	}
+
+	return destIdent
+}