WebSocket client for Sync receiver connections.

Uses WebSockex to connect from the receiver site to the sender's WebSocket endpoint. Sends requests and receives responses.

Architecture

The receiver uses this client to:

1. Connect to the sender's hosted channel
2. Send requests for data (tables, schema, records)
3. Receive responses and notify the caller (LiveView)

Usage

{:ok, pid} = WebSocketClient.start_link(
  url: "https://sender-site.com",
  code: "ABC12345",
  caller: self()
)

# Request available tables
WebSocketClient.request_tables(pid)
# Receive: {:sync_client, {:tables, tables}}

# Request records
WebSocketClient.request_records(pid, "users", offset: 0, limit: 100)
# Receive: {:sync_client, {:records, "users", result}}