chore: add dependencies and configuration

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

schema.sql

@@ -0,0 +1,20 @@
+CREATE TABLE files (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  public_id VARCHAR(21) UNIQUE NOT NULL,
+  telegram_file_id VARCHAR NOT NULL,
+  telegram_file_unique_id VARCHAR NOT NULL,
+  storage_chat_id BIGINT NOT NULL,
+  storage_message_id BIGINT NOT NULL,
+  file_name VARCHAR NOT NULL,
+  mime_type VARCHAR NOT NULL,
+  size_bytes BIGINT NOT NULL,
+  file_type VARCHAR NOT NULL,
+  uploader_id BIGINT NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX idx_files_public_id ON files(public_id);
+CREATE INDEX idx_files_telegram_file_id ON files(telegram_file_id);
+CREATE INDEX idx_files_uploader_id ON files(uploader_id);
+CREATE INDEX idx_files_created_at ON files(created_at DESC);