feat: add page-fetcher-api — centralised Playwright page fetcher

Introduces page-fetcher-api, a new internal ASP.NET Core service that
centralises all web-page fetching through a single Playwright (headless
Chromium) browser instance. All fetches are persisted to the pageFetcher
SQL schema for auditing.

New projects:
- Apis/page-fetcher-api-models: FetchPageRequest, FetchPageResponse, IPageFetcherApiClient
- Apis/page-fetcher-data: PageFetchDbContext, PageFetchEntity, InitialSchema migration (schema: pageFetcher)
- Apis/page-fetcher-api: PlaywrightBrowserService (singleton), PageFetcherService, PageController

Changes to existing services:
- cv-matcher-api: JobTextExtractor now calls IPageFetcherApiClient instead of HttpClient
- cv-search-job: HtmlJobSearcher uses IPageFetcherApiClient (removes inline Playwright);
  CvSearchJobTask fetches individual job pages and applies keyword pre-filter before
  LLM call; passes pre-fetched JobDescription to cv-matcher-api to skip re-fetch
- common: add PageFetcherApiSettings
- docker-compose.yml, build.yml: add new service + env vars for callers

Closes #43

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

Apis/cv-matcher-api/Program.cs

@@ -13,6 +13,7 @@ using Microsoft.EntityFrameworkCore;
 using Refit;
 using Serilog;
 using Common.Settings;
+using PageFetcher.Models;
 using StartupHelpers;
 using System.Reflection;
 
@@ -36,6 +37,16 @@ try
     builder.Services.Configure<CvMatcher.Models.Settings.AiSettings>(builder.Configuration.GetSection("Ai"));
     builder.Services.Configure<MatcherSettings>(builder.Configuration.GetSection("Matcher"));
     builder.Services.Configure<JobSearchSettings>(builder.Configuration.GetSection("JobSearch"));
+    builder.Services.Configure<PageFetcherApiSettings>(builder.Configuration.GetSection("PageFetcherApi"));
+
+    builder.Services.AddRefitClient<IPageFetcherApiClient>()
+        .ConfigureHttpClient((sp, c) =>
+        {
+            var settings = sp.GetRequiredService<Microsoft.Extensions.Options.IOptions<PageFetcherApiSettings>>().Value;
+            c.BaseAddress = new Uri(settings.BaseUrl.TrimEnd('/') + "/");
+            if (!string.IsNullOrWhiteSpace(settings.InternalApiKey))
+                c.DefaultRequestHeaders.Add("X-Internal-Api-Key", settings.InternalApiKey);
+        });
 
     builder.Services.AddRefitClient<IRefitRagApi>()
         .ConfigureHttpClient((sp, c) =>
@@ -50,7 +61,7 @@ try
 
     builder.Services.AddScoped<IRagApiClient, RagApiClient>();
     builder.Services.AddHttpClient<IMatcherAiClient, MatcherAiClient>();
-    builder.Services.AddHttpClient<IJobTextExtractor, JobTextExtractor>();
+    builder.Services.AddScoped<IJobTextExtractor, JobTextExtractor>();
 
     builder.Services.AddDbContext<CvMatcherDbContext>(options =>
     {