Add user avatar management and moderation

database/schema.sql

@@ -6,6 +6,13 @@ CREATE TABLE IF NOT EXISTS user_profiles (
 	updated_at TEXT NOT NULL
 );
 INSERT OR IGNORE INTO user_profiles(user_id,display_name,updated_at) SELECT id,username,created_at FROM users;
+CREATE TABLE IF NOT EXISTS user_avatars (
+	user_id TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+	source TEXT NOT NULL CHECK(source IN ('preset', 'upload')),
+	value TEXT NOT NULL,
+	byte_size INTEGER CHECK(byte_size IS NULL OR byte_size >= 0),
+	updated_at TEXT NOT NULL
+);
 CREATE TABLE IF NOT EXISTS builds (id TEXT PRIMARY KEY, owner_id TEXT NOT NULL REFERENCES users(id), title TEXT NOT NULL, slug TEXT NOT NULL UNIQUE, visibility TEXT NOT NULL DEFAULT 'draft', summary TEXT, guide_body TEXT, source_build_id TEXT REFERENCES builds(id), created_at TEXT NOT NULL, updated_at TEXT NOT NULL);
 CREATE TABLE IF NOT EXISTS build_items (id TEXT PRIMARY KEY, build_id TEXT NOT NULL REFERENCES builds(id) ON DELETE CASCADE, slot_id TEXT NOT NULL, item_definition_id TEXT NOT NULL, configuration_json TEXT NOT NULL);
 CREATE TABLE IF NOT EXISTS ratings (user_id TEXT NOT NULL REFERENCES users(id), build_id TEXT NOT NULL REFERENCES builds(id) ON DELETE CASCADE, value INTEGER NOT NULL CHECK(value BETWEEN 1 AND 5), PRIMARY KEY(user_id, build_id));