Replace .log w/ explicit .debug/.error functions

This would make the intention more explicit so we can overload different logging types as well like keychain, security events, etc…

Search/Replace Strategies:

1.
Search regex: `SecureLogger\.log\(\s*(.*?),\s*category:\s*(.*?),\s*level:\s*\.(\w+)\s*\)`
Replace regex: `SecureLogger.$3($1, category: $2)`

Sample input:
```
SecureLogger.log(
    "🔄 Found favorite for '\(peerInfo.nickname)' by nickname, updating noise key",
    category: .session,
    level: .debug
)
```

Sample output:
`SecureLogger.debug("🔄 Found favorite for '\(peerInfo.nickname)' by nickname, updating noise key", category: .session)`

---

2.
Search regex: `SecureLogger\.log\((.*?)\)`
Replace regex: `SecureLogger.debug($1)` (as it’s the default level)

Sample input:
`SecureLogger.log("some text")`

Sample output:
`SecureLogger.debug("some text")`

---

3
Manual changes:
ChatViewModel line 5393 (commented code)
NostrRelayManager line 196 (commented code)
NostrRelayManager lines 346-350 (if/else logic)
NostrRelayManager line 371 (commented code)

bitchat/Identity/SecureIdentityStateManager.swift

@@ -191,7 +191,7 @@ final class SecureIdentityStateManager {
             let sealedBox = try AES.GCM.seal(data, using: encryptionKey)
             let saved = keychain.saveIdentityKey(sealedBox.combined!, forKey: cacheKey)
             if saved {
-                SecureLogger.log("Identity cache saved to keychain", category: .security, level: .debug)
+                SecureLogger.debug("Identity cache saved to keychain", category: .security)
             }
         } catch {
             SecureLogger.logError(error, context: "Failed to save identity cache", category: .security)
@@ -395,7 +395,7 @@ final class SecureIdentityStateManager {
     }
     
     func setBlocked(_ fingerprint: String, isBlocked: Bool) {
-        SecureLogger.log("User \(isBlocked ? "blocked" : "unblocked"): \(fingerprint)", category: .security, level: .info)
+        SecureLogger.info("User \(isBlocked ? "blocked" : "unblocked"): \(fingerprint)", category: .security)
         
         queue.async(flags: .barrier) {
             if var identity = self.cache.socialIdentities[fingerprint] {
@@ -519,7 +519,7 @@ final class SecureIdentityStateManager {
     // MARK: - Cleanup
     
     func clearAllIdentityData() {
-        SecureLogger.log("Clearing all identity data", category: .security, level: .warning)
+        SecureLogger.warning("Clearing all identity data", category: .security)
         
         queue.async(flags: .barrier) {
             self.cache = IdentityCache()
@@ -543,7 +543,7 @@ final class SecureIdentityStateManager {
     // MARK: - Verification
     
     func setVerified(fingerprint: String, verified: Bool) {
-        SecureLogger.log("Fingerprint \(verified ? "verified" : "unverified"): \(fingerprint)", category: .security, level: .info)
+        SecureLogger.info("Fingerprint \(verified ? "verified" : "unverified"): \(fingerprint)", category: .security)
         
         queue.async(flags: .barrier) {
             if verified {