Models unit; session model; generalize session classes/interfaces

app/models/http/Session.model.ts

@@ -0,0 +1,20 @@
+import {Field} from '../../../orm/src/model/Field.ts'
+import {Type} from '../../../orm/src/db/types.ts'
+import {SessionModel} from '../../../lib/src/module.ts'
+
+export default class Session extends SessionModel {
+    protected static table = 'sessions'
+    protected static key = 'session_id'
+
+    protected static readonly CREATED_AT = 'start_time'
+    protected static readonly UPDATED_AT = null // No updated at
+
+    @Field(Type.int)
+    protected session_id!: number
+
+    @Field(Type.int)
+    protected user_id?: number
+
+    @Field(Type.timestamp)
+    protected start_time!: Date
+}