fix: Handle node public key mismatch and show warning (#1720)

* Handle node public key mismatch and show warning

- Add a mismatchKey flag to Node and MessageTopBar to indicate a public key mismatch.
- Set the public key to a default error value (all zeros) when a node's public key changes.
- Display a warning in the MessageTopBar when a key mismatch is detected in PKC.
- Only clear all nodes when a different mynode number is present.

* feat: Add key mismatch detection to NodeInfoDao

This commit introduces a new feature to the `NodeInfoDao` that detects and handles public key mismatches for existing nodes.

-   A new function `upsertCheckKeyMatch` is added to `NodeInfoDao` that checks for public key changes when upserting a node. If a mismatch is detected, the public key is set to `ERROR_BYTE_STRING`, and a warning is logged.
- The function `upsertCheckKeyMatch` is used instead of `upsert` in `NodeRepository` and in `putAll` inside of `NodeInfoDao`.
-   A new test `testPkcMismatch` is added to `NodeInfoDaoTest` to verify the key mismatch detection.
- Changed `testNodes` to have unique public keys.
- Added `mismatchKey` state to the node model.

* detekt spacing

* Refactor: Correctly handle different node installations in NodeRepository

The logic for detecting different node installations in `NodeRepository.kt` was inverted, this commit fixes the logic to use `!=` instead of `==` to detect if the node number has changed.

app/src/main/java/com/geeksville/mesh/ui/message/Message.kt

@@ -184,6 +184,8 @@ internal fun MessageScreen(
         DataPacket.ID_BROADCAST -> channelName
         else -> viewModel.getUser(nodeId).longName
     }
+    val mismatchKey =
+        DataPacket.PKC_CHANNEL_INDEX == channelIndex && viewModel.getNode(nodeId).mismatchKey
 
 //    if (channelIndex != DataPacket.PKC_CHANNEL_INDEX && nodeId != DataPacket.ID_BROADCAST) {
 //        subtitle = "(ch: $channelIndex - $channelName)"
@@ -242,7 +244,7 @@ internal fun MessageScreen(
                     }
                 }
             } else {
-                MessageTopBar(title, channelIndex, onNavigateBack)
+                MessageTopBar(title, channelIndex, mismatchKey, onNavigateBack)
             }
         },
         bottomBar = {
@@ -368,6 +370,7 @@ private fun ActionModeTopBar(
 private fun MessageTopBar(
     title: String,
     channelIndex: Int?,
+    mismatchKey: Boolean = false,
     onNavigateBack: () -> Unit
 ) = TopAppBar(
     title = { Text(text = title) },
@@ -381,7 +384,7 @@ private fun MessageTopBar(
     },
     actions = {
         if (channelIndex == DataPacket.PKC_CHANNEL_INDEX) {
-            NodeKeyStatusIcon(hasPKC = true, mismatchKey = false)
+            NodeKeyStatusIcon(hasPKC = true, mismatchKey = mismatchKey)
         }
     }
 )