Align email-api and page-fetcher-api namespaces to Api.* convention

Fixes inconsistency where email-api used EmailApi.* and page-fetcher-api
used PageFetcherApi.*, while cv-matcher-api and rag-api use the generic
Api.* namespace. All four API projects now follow the same pattern.

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

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

@@ -8,7 +8,7 @@ using PageFetcher.Data.Entities;
 using PageFetcher.Models;
 using PageFetcher.Models.Settings;
 
-namespace PageFetcherApi.Services;
+namespace Api.Services;
 
 /// <summary>
 /// Fetches a web page via Playwright, extracts plain text, persists the result to the database,

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

@@ -1,6 +1,6 @@
 using Microsoft.Playwright;
 
-namespace PageFetcherApi.Services;
+namespace Api.Services;
 
 /// <summary>
 /// Singleton hosted service that owns the Playwright Chromium browser process for the lifetime of the application.