feat: establish Orbit models, migrations and development baseline

model/digest.go

@@ -0,0 +1,16 @@
+package model
+
+import (
+	"database/sql/driver"
+	"errors"
+)
+
+func (d Digest) Value() (driver.Value, error) { return d[:], nil }
+func (d *Digest) Scan(src any) error {
+	b, ok := src.([]byte)
+	if !ok || len(b) != len(d) {
+		return errors.New("digest: expected BINARY(32)")
+	}
+	copy(d[:], b)
+	return nil
+}