feat: track history being stored

This is done because sometimes we receive history after the first connect too, and to ensure the "isLatest" flag is accurate -- we ensure no history was received previously

src/Types/Auth.ts

@@ -1,5 +1,6 @@
 import type { proto } from '../../WAProto'
 import type { Contact } from './Contact'
+import type { MinimalMessage } from './Message'
 
 export type KeyPair = { public: Uint8Array, private: Uint8Array }
 export type SignedKeyPair = { keyPair: KeyPair, signature: Uint8Array, keyId: number }
@@ -45,6 +46,8 @@ export type AuthenticationCreds = SignalCreds & {
 
     lastAccountSyncTimestamp?: number
     platform?: string
+
+    processedHistoryMessages: MinimalMessage[]
     accountSettings: AccountSettings
 }