feat: Add ent-based sqlite3 storage

Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

storage/ent/schema/refreshtoken.go

@@ -0,0 +1,89 @@
+package schema
+
+import (
+	"time"
+
+	"github.com/facebook/ent"
+	"github.com/facebook/ent/schema/field"
+)
+
+/* Original SQL table:
+create table refresh_token
+(
+    id                        text    not null  primary key,
+    client_id                 text    not null,
+    scopes                    blob    not null,
+    nonce                     text    not null,
+    claims_user_id            text    not null,
+    claims_username           text    not null,
+    claims_email              text    not null,
+    claims_email_verified     integer not null,
+    claims_groups             blob    not null,
+    connector_id              text    not null,
+    connector_data            blob,
+    token                     text      default '' not null,
+    created_at                timestamp default '0001-01-01 00:00:00 UTC' not null,
+    last_used                 timestamp default '0001-01-01 00:00:00 UTC' not null,
+    claims_preferred_username text      default '' not null
+);
+*/
+
+// RefreshToken holds the schema definition for the RefreshToken entity.
+type RefreshToken struct {
+	ent.Schema
+}
+
+// Fields of the RefreshToken.
+func (RefreshToken) Fields() []ent.Field {
+	return []ent.Field{
+		field.Text("id").
+			SchemaType(textSchema).
+			NotEmpty().
+			Unique(),
+		field.Text("client_id").
+			SchemaType(textSchema).
+			NotEmpty(),
+		field.JSON("scopes", []string{}).
+			Optional(),
+		field.Text("nonce").
+			SchemaType(textSchema).
+			NotEmpty(),
+
+		field.Text("claims_user_id").
+			SchemaType(textSchema).
+			NotEmpty(),
+		field.Text("claims_username").
+			SchemaType(textSchema).
+			NotEmpty(),
+		field.Text("claims_email").
+			SchemaType(textSchema).
+			NotEmpty(),
+		field.Bool("claims_email_verified"),
+		field.JSON("claims_groups", []string{}).
+			Optional(),
+		field.Text("claims_preferred_username").
+			SchemaType(textSchema).
+			Default(""),
+
+		field.Text("connector_id").
+			SchemaType(textSchema).
+			NotEmpty(),
+		field.Bytes("connector_data").
+			Nillable().
+			Optional(),
+
+		field.Text("token").
+			SchemaType(textSchema).
+			Default(""),
+
+		field.Time("created_at").
+			Default(time.Now),
+		field.Time("last_used").
+			Default(time.Now),
+	}
+}
+
+// Edges of the RefreshToken.
+func (RefreshToken) Edges() []ent.Edge {
+	return []ent.Edge{}
+}