Standardize softwareType to lowercase everywhere

- ConfigManager.buildConfig() now lowercases softwareType
- Updated config JSON defaults to lowercase
- childRegistrationUtils lowercases softwareType on extraction
- Closes #8

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/configs/pumpingStation.json

@@ -59,7 +59,7 @@
     },
     "functionality": {
         "softwareType": {
-            "default": "pumpingStation",
+            "default": "pumpingstation",
             "rules": {
                 "type": "string",
                 "description": "Specified software type used to locate the proper default configuration."
@@ -150,7 +150,7 @@
             }
         },
         "type": {
-            "default": "pumpingStation",
+            "default": "pumpingstation",
             "rules": {
                 "type": "string",
                 "description": "Specific asset type used to identify this configuration."