Move PageFetcherSettings to page-fetcher-api-models, consistent with EmailApiSettings pattern

Settings class now lives in Apis/page-fetcher-api-models/Settings/ with
namespace PageFetcher.Models.Settings, matching how EmailApiSettings is
placed in email-api-models/Settings/.

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

Apis/page-fetcher-api-models/Settings/PageFetcherSettings.cs

@@ -0,0 +1,17 @@
+namespace PageFetcher.Models.Settings;
+
+/// <summary>
+/// Runtime settings for the page-fetcher service.
+/// Bound from the <c>PageFetcher</c> configuration section.
+/// </summary>
+public sealed class PageFetcherSettings
+{
+    /// <summary>Default Playwright wait condition (<c>networkidle</c>, <c>load</c>, <c>domcontentloaded</c>).</summary>
+    public string DefaultWaitFor { get; set; } = "networkidle";
+
+    /// <summary>Page navigation timeout in seconds.</summary>
+    public int TimeoutSeconds { get; set; } = 30;
+
+    /// <summary>Maximum characters stored/returned in the extracted text field.</summary>
+    public int MaxTextChars { get; set; } = 60_000;
+}