Refactor event and session column names to camelCase

- Updated test cases to reflect new column names (eve_MAC -> eveMac, eve_DateTime -> eveDateTime, etc.) across various test files.
- Modified SQL table definitions in the database cleanup and migration tests to use camelCase naming conventions.
- Implemented migration tests to ensure legacy column names are correctly renamed to camelCase equivalents.
- Ensured that existing data is preserved during the migration process and that views referencing old column names are dropped before renaming.
- Verified that the migration function is idempotent, allowing for safe re-execution without data loss.

front/php/components/graph_online_history.php

@@ -28,13 +28,13 @@ function initOnlineHistoryGraph() {
 
         res.data.forEach(function(entry) {
 
-            var formattedTime = localizeTimestamp(entry.Scan_Date).slice(11, 17);
+            var formattedTime = localizeTimestamp(entry.scanDate).slice(11, 17);
 
             timeStamps.push(formattedTime);
-            onlineCounts.push(entry.Online_Devices);
-            downCounts.push(entry.Down_Devices);
-            offlineCounts.push(entry.Offline_Devices);
-            archivedCounts.push(entry.Archived_Devices);
+            onlineCounts.push(entry.onlineDevices);
+            downCounts.push(entry.downDevices);
+            offlineCounts.push(entry.offlineDevices);
+            archivedCounts.push(entry.archivedDevices);
         });
 
         // Call your presenceOverTime function after data is ready

front/php/templates/language/lang.php

@@ -24,7 +24,7 @@ $pia_lang_selected = isset($_langMatch[1]) ? strtolower($_langMatch[1]) : $defau
 $result = $db->query("SELECT * FROM Plugins_Language_Strings");
 $strings = array();
 while ($row = $result->fetchArray(SQLITE3_ASSOC)) {
-    $strings[$row['String_Key']] = $row['String_Value'];
+    $strings[$row['stringKey']] = $row['stringValue'];
 }