[SDK-363] Expose register device token

[jferrao-itrbl]

🔹 JIRA Ticket(s) if any

• SDK-363

✏️ Description

Expose registerDeviceToken in React Native bridge:

• Add Iterable.registerDeviceToken(token) public API
• Add bridge proxy IterableApi.registerDeviceToken(token)
• Add TurboModule spec entry in NativeRNIterableAPI.ts
• Add iOS Swift/Obj-C++ glue with hex-to-Data conversion for APNS tokens
• Add Android impl + old/new architecture stubs for direct FCM token pass-through
• Update MockRNIterableAPI and unit tests
• Add CHANGELOG entry under Unreleased

[github-actions]

Lines	Statements	Branches	Functions
	68.95% (522/757)	56.11% (202/360)	65.09% (166/255)

[qltysh]

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[joaodordio]

Left some comments on the data(fromHex:) method that could cause regressions, but those are simple changes!

Suggestion:

private func data(fromHex hex: String) -> Data? {
  guard !hex.isEmpty, hex.count.isMultiple(of: 2) else { return nil }
  var data = Data(capacity: hex.count / 2)
  var chars = hex.makeIterator()
  while let high = chars.next(), let low = chars.next() {
    guard let highValue = high.hexDigitValue, let lowValue = low.hexDigitValue else {
      return nil
    }
    data.append(UInt8(highValue << 4 | lowValue))
  }
  return data
}

Everything else looks good! Nice work!

[joaodordio]

data(fromHex:) returns a non-nil empty Data for empty input, so registerDeviceToken("") falls through and calls IterableAPI.register(token: Data()). That registers an empty APNS token with no error surfaced. Add an hex.isEmpty guard at the top of data(fromHex:) (or in registerDeviceToken before the call) and log the same ITBError so callers see something in their logs.

[joaodordio]

if the token is empty, data(fromHex:) will not fail here because it returns an empty Data().

[joaodordio]

NIT: Odd-length input gets silently truncated. The last hex char is consumed by high and the loop exits on low == nil, so we return a token shorter than the source with no error. APNS tokens are always even length, but customers paste tokens from unpredictable places and a malformed input should fail loudly. Reject inputs whose count isn't a multiple of 2 (return nil) so the existing ITBError branch fires.