feat: add automated actions tables (#5857)

Add tables to support automated actions based on the [design
document](https://docs.google.com/document/d/15xPgn6B8gzMPk9RjMAUGu8XvozQ_45jjrsVl_Bm6Chg/edit?usp=sharinghttps://docs.google.com/document/d/15xPgn6B8gzMPk9RjMAUGu8XvozQ_45jjrsVl_Bm6Chg/edit?usp=sharing)

src/migrations/20240111125100-automated-actions.js

@@ -0,0 +1,44 @@
+exports.up = function (db, cb) {
+    db.runSql(
+        `
+        CREATE TABLE IF NOT EXISTS action_sets
+        (
+            id SERIAL PRIMARY KEY NOT NULL,
+            created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+            created_by_user_id INTEGER,
+            name varchar(255),
+            project VARCHAR(255) NOT NULL,
+            actor_id INTEGER,
+            source varchar(255),
+            source_id INTEGER,
+            payload JSONB DEFAULT '{}'::jsonb NOT NULL,
+            FOREIGN KEY (project) references projects(id) ON DELETE CASCADE
+        );
+
+        CREATE TABLE IF NOT EXISTS actions
+        (
+            id SERIAL PRIMARY KEY NOT NULL,
+            created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+            created_by_user_id INTEGER,
+            action_set_id INTEGER references action_sets (id) ON DELETE CASCADE,
+            sort_order INTEGER,
+            action varchar(255) NOT NULL,
+            execution_params JSONB DEFAULT '{}'::jsonb NOT NULL
+        );
+
+        CREATE INDEX idx_action_sets_project ON action_sets (project);
+        `,
+        cb,
+    );
+};
+
+exports.down = function (db, cb) {
+    db.runSql(
+        `
+        DROP INDEX IF EXISTS idx_action_sets_project;
+        DROP TABLE IF EXISTS actions;
+        DROP TABLE IF EXISTS action_sets;
+        `,
+        cb,
+    );
+};