Initial MVP commit

internal/adapters/postgres/scan.go

@@ -0,0 +1,38 @@
+package postgres
+
+import (
+	"database/sql"
+	"time"
+)
+
+func ptrFloat64(v sql.NullFloat64) *float64 {
+	if !v.Valid {
+		return nil
+	}
+	f := v.Float64
+	return &f
+}
+
+func ptrString(v sql.NullString) *string {
+	if !v.Valid {
+		return nil
+	}
+	s := v.String
+	return &s
+}
+
+func ptrBool(v sql.NullBool) *bool {
+	if !v.Valid {
+		return nil
+	}
+	b := v.Bool
+	return &b
+}
+
+func ptrTime(v sql.NullTime) *time.Time {
+	if !v.Valid {
+		return nil
+	}
+	t := v.Time
+	return &t
+}