feat: init

migrate/007_issue_reaction.sql

@@ -0,0 +1,16 @@
+-- 007: Issue reactions
+
+-- ─── Issue Reactions ──────────────────────────────────────────────────────
+CREATE TABLE IF NOT EXISTS issue_reaction (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    issue_id UUID NOT NULL REFERENCES issue(id) ON DELETE CASCADE,
+    user_id UUID NOT NULL REFERENCES "user"(id) ON DELETE CASCADE,
+    content TEXT NOT NULL,
+    target_type TEXT NOT NULL,
+    target_id UUID NULL,
+    created_at TIMESTAMPTZ NOT NULL,
+    CONSTRAINT uq_issue_reaction UNIQUE (issue_id, user_id, content, target_type)
+);
+CREATE INDEX IF NOT EXISTS idx_issue_reaction_issue_id ON issue_reaction (issue_id);
+CREATE INDEX IF NOT EXISTS idx_issue_reaction_user_id ON issue_reaction (user_id);
+CREATE INDEX IF NOT EXISTS idx_issue_reaction_target ON issue_reaction (target_type, target_id);