Support for comments

migrations/20251001165158_create_comments_table.sql

@@ -0,0 +1,7 @@
+CREATE TABLE comments (
+    comment_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    post_id UUID NOT NULL REFERENCES posts (post_id) ON DELETE CASCADE,
+    author TEXT,
+    content TEXT NOT NULL,
+    published_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);