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/plugins/asuswrt_import/config.json

@@ -9,7 +9,7 @@
   "mapped_to_table": "CurrentScan",
   "data_filters": [
     {
-      "compare_column": "Object_PrimaryID",
+      "compare_column": "objectPrimaryId",
       "compare_operator": "==",
       "compare_field_id": "txtMacFilter",
       "compare_js_template": "'{value}'.toString()",
@@ -431,7 +431,7 @@
   ],
   "database_column_definitions": [
     {
-      "column": "Index",
+      "column": "index",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "none",
@@ -448,7 +448,7 @@
       ]
     },
     {
-      "column": "Object_PrimaryID",
+      "column": "objectPrimaryId",
       "css_classes": "col-sm-2",
       "default_value": "",
       "localized": [
@@ -474,7 +474,7 @@
       "type": "device_mac"
     },
     {
-      "column": "Object_SecondaryID",
+      "column": "objectSecondaryId",
       "css_classes": "col-sm-2",
       "default_value": "",
       "localized": [
@@ -500,7 +500,7 @@
       "type": "device_ip"
     },
     {
-      "column": "Watched_Value1",
+      "column": "watchedValue1",
       "css_classes": "col-sm-2",
       "default_value": "",
       "localized": [
@@ -526,7 +526,7 @@
       "type": "label"
     },
     {
-      "column": "Watched_Value2",
+      "column": "watchedValue2",
       "mapped_to_column": "scanVendor",
       "css_classes": "col-sm-2",
       "default_value": "",
@@ -573,7 +573,7 @@
       ]
     },
     {
-      "column": "DateTimeCreated",
+      "column": "dateTimeCreated",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -590,7 +590,7 @@
       ]
     },
     {
-      "column": "DateTimeChanged",
+      "column": "dateTimeChanged",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -607,7 +607,7 @@
       ]
     },
     {
-      "column": "Status",
+      "column": "status",
       "css_classes": "col-sm-1",
       "show": true,
       "type": "replace",