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/deviceDetailsSessions.php

@@ -121,12 +121,12 @@ function loadSessionsData() {
       if (data.success && data.sessions.length) {
         data.sessions.forEach(session => {
           table.row.add([
-            session.ses_DateTimeOrder,
-            session.ses_Connection,
-            session.ses_Disconnection,
-            session.ses_Duration,
-            session.ses_IP,
-            session.ses_Info
+            session.sesDateTimeOrder,
+            session.sesConnection,
+            session.sesDisconnection,
+            session.sesDuration,
+            session.sesIp,
+            session.sesInfo
           ]);
         });
       }