Async + Multi Cache (#1741)

* fix: handle invalid signatureKeyPublic types in sender-key-state

- added extra check to ensure signatureKeyPublic is either a base64 string or a Buffer
- fallback to empty buffer when unexpected object type is received
- prevents ERR_INVALID_ARG_TYPE error in Buffer.from

* adjusted based on  @jlucaso1 recommmendation

* fix: handle chain key objects for skmsg group message decryption

previously, some sender chain keys were stored or retrieved as plain objects
(e.g. { '0': 85, '1': 100, ... }) instead of Buffers. this caused
"ERR_INVALID_ARG_TYPE" during initial decryption of skmsg group messages.

this fixes any chain key object is converted to a proper Buffer
before being passed to SenderChainKey.

* fix: add more robust checks and fallbacks

* feat: async cache

feat: async caching

* fix: linting issues

* fix: mget logic

---------

Co-authored-by: αѕтяσχ11 <devastro0010@gmail.com>

src/Utils/process-message.ts

@@ -264,7 +264,7 @@ const processMessage = async (
 			case proto.Message.ProtocolMessage.Type.PEER_DATA_OPERATION_REQUEST_RESPONSE_MESSAGE:
 				const response = protocolMsg.peerDataOperationRequestResponseMessage!
 				if (response) {
-					placeholderResendCache?.del(response.stanzaId!)
+					await placeholderResendCache?.del(response.stanzaId!)
 					// TODO: IMPLEMENT HISTORY SYNC ETC (sticker uploads etc.).
 					const { peerDataOperationResult } = response
 					for (const result of peerDataOperationResult!) {