Repeated calls to api/v1/sdk/events/blacklist when internet connection offline

[measuredweighed]

When a users internet connection is offline Adapty SDK is making repeated calls to the https://api.adapty.io/api/v1/sdk/events/blacklist/ endpoint on launch, causing EventManager.trackEvent to peg the CPU.

We initialise Adapty in our UIApplicationDelegate's func application(_ application:, didFinishLaunchingWithOptions launchOptions:) like so:

Adapty.activate("X", observerMode: true)

This is the only call made to Adapty before the requests start. To replicate this you can follow the following steps:

1. Turn on Airplane mode
2. Start an application that makes use of the Adapty iOS SDK

Ideally a failure to fetch the events/blacklist would result in an exponential backoff, rather than repeated re-attempts.

Task <AB7BCD97-98C1-45DB-9F83-88EDF1382F13>.<4920> finished with error [-1009] 
Error Domain=NSURLErrorDomain Code=-1009 "The internet connection appears to be offline."
 UserInfo={_kCFStreamErrorCodeKey=50, NSUnderlyingError=0x280b573f0 
 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 "(null)" UserInfo={_kCFStreamErrorDomainKey=1, 
 _kCFStreamErrorCodeKey=50, _NSURLErrorNWResolutionReportKey=Resolved 0 endpoints in 0ms 
 using unknown from cache, _NSURLErrorNWPathKey=unsatisfied (No network route)}}, 
 _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <AB7BCD97-98C1-45DB-9F83-88EDF1382F13>.<4920>,
 _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <AB7BCD97-98C1-45DB-9F83-88EDF1382F13>.<4920>"
), NSLocalizedDescription=The internet connection appears to be offline., 
NSErrorFailingURLStringKey=https://api.adapty.io/api/v1/sdk/events/blacklist/, 
NSErrorFailingURLKey=https://api.adapty.io/api/v1/sdk/events/blacklist/, _kCFStreamErrorDomainKey=1}
Connection 4943: received failure notification
Connection 4943: failed to connect 1:50, reason -1
Connection 4943: encountered error(1:50)

[x401om]

Hi, @measuredweighed! Thanks for pointing out the issue, we've fixed it in version 2.9.3. Really appreciate your help in making our SDK better!