feat(isac): add moderated contributor mode

database/schema.sql

@@ -161,6 +161,8 @@ CREATE TABLE IF NOT EXISTS data_change_proposals (
 	module TEXT NOT NULL CHECK(module IN ('stats','talents','brands','gear','weapons','protocols')),
 	action TEXT NOT NULL,
 	entity_id TEXT,
+	draft_entity_id TEXT,
+	applied_entity_id TEXT,
 	summary TEXT NOT NULL,
 	payload_json TEXT NOT NULL,
 	status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending','approved','rejected','failed')),
@@ -173,6 +175,21 @@ CREATE TABLE IF NOT EXISTS data_change_proposals (
 );
 CREATE INDEX IF NOT EXISTS data_change_proposals_status_created_idx ON data_change_proposals(status,created_at DESC);
 CREATE INDEX IF NOT EXISTS data_change_proposals_module_status_idx ON data_change_proposals(module,status);
+CREATE TABLE IF NOT EXISTS data_change_proposal_dependencies (
+	proposal_id TEXT NOT NULL REFERENCES data_change_proposals(id) ON DELETE CASCADE,
+	depends_on_proposal_id TEXT NOT NULL REFERENCES data_change_proposals(id) ON DELETE RESTRICT,
+	PRIMARY KEY(proposal_id,depends_on_proposal_id),
+	CHECK(proposal_id<>depends_on_proposal_id)
+);
+CREATE INDEX IF NOT EXISTS data_change_proposal_dependencies_dependency_idx ON data_change_proposal_dependencies(depends_on_proposal_id);
+CREATE TABLE IF NOT EXISTS contributor_agreements (
+	user_id TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+	guidelines_version TEXT NOT NULL,
+	accepted_at TEXT NOT NULL,
+	enabled INTEGER NOT NULL DEFAULT 1 CHECK(enabled IN (0,1)),
+	enabled_at TEXT NOT NULL,
+	disabled_at TEXT
+);
 CREATE TABLE IF NOT EXISTS discord_profiles (
 	user_id TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
 	discord_id TEXT NOT NULL UNIQUE,