notification (#282)

Reviewed-on: #282

migration.sql

@@ -150,3 +150,12 @@ CREATE TABLE IF NOT EXISTS "boathouse" (
     CONSTRAINT unq UNIQUE (aisle, side, level) -- only 1 boat allowed to rest at each space 
 );
 
+CREATE TABLE IF NOT EXISTS "notification" (
+	"id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+	"user_id" INTEGER NOT NULL REFERENCES user(id),
+	"message" TEXT NOT NULL,
+	"read_at" DATETIME,
+	"created_at" DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL,
+	"category" TEXT NOT NULL,
+	"link" TEXT
+);