feat: add automatic CTWA (Click-to-WhatsApp) ads message recovery

Messages from Facebook/Instagram ads (Click-to-WhatsApp) don't arrive on
linked devices because Meta's ads endpoint doesn't encrypt for multi-device.
They arrive as "Message absent from node" placeholders.

This change automatically requests the message from the primary phone via
PDO (Peer Data Operation) when a CTWA placeholder is detected.

Changes:
- Add enableCTWARecovery config option (default: true)
- Trigger requestPlaceholderResend() for "Message absent from node" errors
- Add Prometheus metrics for CTWA recovery tracking
- Add comprehensive unit tests for CTWA recovery functionality

Resolves: https://github.com/WhiskeySockets/Baileys/issues/1723
Resolves: https://github.com/WhiskeySockets/Baileys/issues/1034

src/Types/Socket.ts

@@ -107,6 +107,21 @@ export type SocketConfig = {
 	/** Enable recent message caching for retry handling */
 	enableRecentMessageCache: boolean
 
+	/**
+	 * Enable automatic recovery of Click-to-WhatsApp (CTWA) ads messages.
+	 *
+	 * When enabled, messages from Facebook/Instagram ads that arrive as
+	 * "placeholder messages" (Message absent from node) will be automatically
+	 * recovered by requesting resend from the primary phone device.
+	 *
+	 * This is necessary because Meta's ads endpoint doesn't encrypt messages
+	 * for linked devices - they only arrive on the primary phone.
+	 *
+	 * @default true
+	 * @see https://github.com/WhiskeySockets/Baileys/issues/1723
+	 */
+	enableCTWARecovery: boolean
+
 	/**
 	 * Returns if a jid should be ignored,
 	 * no event for that jid will be triggered.