stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.Provcache/LazyFetch/HttpChunkFetcher.Validation.cs

@@ -0,0 +1,34 @@
+using System;
+
+namespace StellaOps.Provcache;
+
+public sealed partial class HttpChunkFetcher
+{
+    private void ValidateBaseAddress(Uri baseAddress)
+    {
+        if (!baseAddress.IsAbsoluteUri)
+        {
+            throw new InvalidOperationException("Lazy fetch base URL must be absolute.");
+        }
+
+        if (!string.IsNullOrWhiteSpace(baseAddress.UserInfo))
+        {
+            throw new InvalidOperationException("Lazy fetch base URL must not include user info.");
+        }
+
+        if (string.IsNullOrWhiteSpace(baseAddress.Host))
+        {
+            throw new InvalidOperationException("Lazy fetch base URL must include a host.");
+        }
+
+        if (!_allowedSchemes.Contains(baseAddress.Scheme))
+        {
+            throw new InvalidOperationException($"Lazy fetch base URL scheme '{baseAddress.Scheme}' is not allowed.");
+        }
+
+        if (!_allowAllHosts && !IsHostAllowed(baseAddress.Host, _allowedHosts))
+        {
+            throw new InvalidOperationException($"Lazy fetch base URL host '{baseAddress.Host}' is not allowlisted.");
+        }
+    }
+}