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/dig_scan/config.json

@@ -8,7 +8,7 @@
   "show_ui": true,
   "data_filters": [
     {
-      "compare_column": "Object_PrimaryID",
+      "compare_column": "objectPrimaryId",
       "compare_operator": "==",
       "compare_field_id": "txtMacFilter",
       "compare_js_template": "'{value}'.toString()",
@@ -299,7 +299,7 @@
   ],
   "database_column_definitions": [
     {
-      "column": "Index",
+      "column": "index",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "none",
@@ -314,7 +314,7 @@
       ]
     },
     {
-      "column": "Object_PrimaryID",
+      "column": "objectPrimaryId",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "device_name_mac",
@@ -333,7 +333,7 @@
       ]
     },
     {
-      "column": "Object_SecondaryID",
+      "column": "objectSecondaryId",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -352,7 +352,7 @@
       ]
     },
     {
-      "column": "Watched_Value1",
+      "column": "watchedValue1",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -367,7 +367,7 @@
       ]
     },
     {
-      "column": "Watched_Value2",
+      "column": "watchedValue2",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -382,7 +382,7 @@
       ]
     },
     {
-      "column": "DateTimeCreated",
+      "column": "dateTimeCreated",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -397,7 +397,7 @@
       ]
     },
     {
-      "column": "DateTimeChanged",
+      "column": "dateTimeChanged",
       "css_classes": "col-sm-2",
       "show": true,
       "type": "label",
@@ -412,7 +412,7 @@
       ]
     },
     {
-      "column": "Status",
+      "column": "status",
       "css_classes": "col-sm-1",
       "show": true,
       "type": "replace",