Add local Windows Server inventory collection and validation; include core package

samsara/core/validation.py

@@ -0,0 +1,10 @@
+import re
+
+def validate_hostname(value):
+    value = value.strip().rstrip(".")
+    if len(value) > 253 or not value or any(
+        not re.fullmatch(r"[A-Za-z0-9](?:[A-Za-z0-9-]{0,61}[A-Za-z0-9])?", label)
+        for label in value.split(".")
+    ):
+        raise ValueError("Enter a hostname or FQDN using letters, digits, hyphens and dots (no URLs or commands).")
+    return value.lower()