Run DB migrations at startup and add cached_files

migrations/20260116094605_create_cached_files_table.sql

@@ -0,0 +1,54 @@
+-- Create cached_files table with all indexes and constraints
+-- This migration is idempotent and safe to run on existing databases
+
+-- Create table if not exists
+CREATE TABLE IF NOT EXISTS cached_files (
+    id INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('cached_files_id_seq'::regclass),
+    object_id INTEGER NOT NULL,
+    object_type VARCHAR(8) NOT NULL,
+    message_id BIGINT NOT NULL,
+    chat_id BIGINT NOT NULL
+);
+
+-- Create sequence if not exists (for compatibility)
+CREATE SEQUENCE IF NOT EXISTS cached_files_id_seq;
+
+-- Ensure the sequence is owned by the table column
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_depend
+        WHERE refobjid = 'cached_files'::regclass
+        AND objid = 'cached_files_id_seq'::regclass
+    ) THEN
+        ALTER SEQUENCE cached_files_id_seq OWNED BY cached_files.id;
+    END IF;
+END $$;
+
+-- Create indexes if they don't exist
+CREATE UNIQUE INDEX IF NOT EXISTS ix_cached_files_message_id ON cached_files (message_id);
+CREATE INDEX IF NOT EXISTS ix_cached_files_object_id ON cached_files (object_id);
+CREATE INDEX IF NOT EXISTS ix_cached_files_object_type ON cached_files (object_type);
+
+-- Create unique constraints if they don't exist
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint
+        WHERE conname = 'uc_cached_files_message_id_chat_id'
+    ) THEN
+        ALTER TABLE cached_files
+        ADD CONSTRAINT uc_cached_files_message_id_chat_id UNIQUE (message_id, chat_id);
+    END IF;
+END $$;
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint
+        WHERE conname = 'uc_cached_files_object_id_object_type'
+    ) THEN
+        ALTER TABLE cached_files
+        ADD CONSTRAINT uc_cached_files_object_id_object_type UNIQUE (object_id, object_type);
+    END IF;
+END $$;