chore: init monorepo with GPL-3.0 license, docs, backend skeleton, frontend wiring

indexium-backend/migrations/20260906000000_init_schema.sql

@@ -0,0 +1,32 @@
+-- Таблица модов (метаданные репозитория)
+CREATE TABLE IF NOT EXISTS mods (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    github_repo_id BIGINT UNIQUE NOT NULL,
+    owner VARCHAR(255) NOT NULL,
+    repo VARCHAR(255) NOT NULL,
+    slug VARCHAR(64) UNIQUE NOT NULL,
+    name VARCHAR(128) NOT NULL,
+    summary TEXT,
+    icon_url TEXT,
+    default_branch VARCHAR(32) NOT NULL DEFAULT 'main',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Таблица версий (релизов), полученных через Webhook/API
+CREATE TABLE IF NOT EXISTS mod_versions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    mod_id UUID NOT NULL REFERENCES mods(id) ON DELETE CASCADE,
+    version_number VARCHAR(64) NOT NULL,
+    game_versions VARCHAR(32)[] NOT NULL,
+    loaders VARCHAR(32)[] NOT NULL,
+    download_url TEXT NOT NULL,
+    file_sha256 CHAR(64) NOT NULL,
+    published_at TIMESTAMPTZ NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    CONSTRAINT unique_mod_version UNIQUE (mod_id, version_number)
+);
+
+-- Индексы для быстрой фильтрации лаунчерами
+CREATE INDEX IF NOT EXISTS idx_mods_slug ON mods(slug);
+CREATE INDEX IF NOT EXISTS idx_versions_lookup ON mod_versions USING GIN (game_versions, loaders);