PhoenixKit V37 Migration: DB Sync - Connections & Transfer Tracking

This migration adds persistent connections and transfer tracking to the DB Sync module.

Changes

Connections Table (phoenix_kit_db_sync_connections)

• Permanent connections between PhoenixKit instances
• Sender-side access controls (approval mode, allowed/excluded tables)
• Expiration and download limits
• Additional security (password, IP whitelist, time restrictions)
• Receiver-side settings (conflict strategy, auto-sync)
• Full audit trail

Transfers Table (phoenix_kit_db_sync_transfers)

• Track all data transfers (uploads and downloads)
• Record counts and bytes transferred
• Approval workflow support
• Request context for security

Key Features

• Approval Modes: auto_approve, require_approval, per_table
• Expiration: Time-based and usage-based limits
• Security: Password protection, IP whitelist, time-of-day restrictions
• Audit Trail: Full tracking of who approved/suspended/revoked connections