Revert "feat(loyalty): EnakPoint & EnakCoin" (#32)

This reverts merge commit 645da30, returning main to f0ff59f.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

migrations/000096_create_customer_devices.up.sql

@@ -1,17 +0,0 @@
--- Devices of the customer app, so customers can get push notifications through FCM
--- (docs/prd-point-coin.md F5: the recipient of a transfer is notified). user_devices
--- only holds staff devices.
-CREATE TABLE customer_devices (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    customer_id UUID NOT NULL REFERENCES customers(id) ON DELETE CASCADE,
-    device_id VARCHAR(255) NOT NULL,
-    platform VARCHAR(50) CHECK (platform IN ('android', 'ios', 'web')),
-    fcm_token VARCHAR(512) NOT NULL,
-    app_version VARCHAR(50),
-    last_active_at TIMESTAMP WITH TIME ZONE,
-    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
-    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
-);
-
-CREATE UNIQUE INDEX idx_customer_devices_customer_device ON customer_devices(customer_id, device_id);
-CREATE INDEX idx_customer_devices_fcm_token ON customer_devices(fcm_token);