feat: Implement Request Sync Manager (V2 Sync) (#965)

* feat: Implement Request Sync Manager (V2 Sync)

- Add RequestSyncManager to track and attribute sync requests
- Update BitchatPacket and BinaryProtocol to support IS_RSR flag (0x10)
- Update RequestSyncPacket with new TLV fields (sinceTimestamp, fragmentIdFilter)
- Update GossipSyncManager to use unicast sync requests and mark responses as RSR
- Update BLEService to enforce timestamp validation for normal packets and exempt valid RSRs
- Add documentation for the new sync manager mechanism

* fix: Resolve compilation errors in V2 Sync implementation

- Remove duplicate restartGossipManager in BLEService
- Add missing TransportConfig constants for sync
- Add 'sync' log category to BitLogger
- Add missing BitLogger import in GossipSyncManager

* fix: Update tests for V2 Sync changes

- Add requestSyncManager parameter to GossipSyncManager init in tests
- Implement getConnectedPeers stub in RecordingDelegate
- Remove unused variable warning in SubscriptionRateLimitTests

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Co-authored-by: a1denvalu3 <>
Co-authored-by: jack <212554440+jackjackbits@users.noreply.github.com>

bitchatTests/SubscriptionRateLimitTests.swift

@@ -75,7 +75,6 @@ struct SubscriptionRateLimitTests {
     @Test("Max attempts threshold prevents complete enumeration")
     func maxAttemptsThresholdPreventsEnumeration() {
         let maxAttempts = TransportConfig.bleSubscriptionRateLimitMaxAttempts
-        let minInterval = TransportConfig.bleSubscriptionRateLimitMinSeconds
 
         // After max attempts within window, announces are suppressed entirely
         // This means an attacker gets at most maxAttempts announces per window