Move PageFetcherSettings back to page-fetcher-api/Settings/, matching SmtpSettings pattern

Server-side-only settings (internal config not needed by callers) belong in
the API project itself, not in the models project. PageFetcherSettings
(DefaultWaitFor, TimeoutSeconds, MaxTextChars) mirrors SmtpSettings in
email-api/Settings/ — callers never reference these.

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

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

@@ -1,17 +0,0 @@
-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;
-}