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/Program.cs

@@ -2,7 +2,7 @@ using System.Reflection;
 using Microsoft.EntityFrameworkCore;
 using PageFetcher.Data;
 using PageFetcherApi.Services;
-using PageFetcher.Models.Settings;
+using PageFetcherApi.Settings;
 using Serilog;
 using StartupHelpers;
 

Apis/page-fetcher-api/Services/PageFetcherService.cs

@@ -6,7 +6,7 @@ using Microsoft.Playwright;
 using PageFetcher.Data;
 using PageFetcher.Data.Entities;
 using PageFetcher.Models;
-using PageFetcher.Models.Settings;
+using PageFetcherApi.Settings;
 
 namespace PageFetcherApi.Services;
 

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

@@ -1,4 +1,4 @@
-namespace PageFetcher.Models.Settings;
+namespace PageFetcherApi.Settings;
 
 /// <summary>
 /// Runtime settings for the page-fetcher service.