feat: add base database management

migrations/0003_tasks.sql

@@ -0,0 +1,19 @@
+create table tasks
+(
+    id          integer                        not null
+        constraint tasks_pk
+            primary key autoincrement,
+    payload_key ANY                            not null
+        constraint tasks_payload_key
+            unique,
+    payload     TEXT                           not null,
+    status_id   integer                        not null
+        constraint tasks_task_statuses_id_fk
+            references statuses,
+    created_at  TEXT default CURRENT_TIMESTAMP not null,
+    updated_at  TEXT
+);
+
+create unique index tasks_payload_key_uindex
+    on tasks (payload_key);
+