Add internet job search feature (cv-search-job)

- New cv-search-models shared library: EF entities + CvSearchDbContext for cvSearch schema (JobSearchTokens, JobSearchSessions, JobSearchResults tables)
- New cv-search-job worker service: polls DB for pending sessions, scrapes job boards via configurable HTML scraping, runs LLM scoring via cv-matcher-api, emails ranked results
- cv-matcher-api: JobTokenService creates one-time tokens; JobSearchController handles link clicks and creates sessions
- api: proxies job-search start endpoint, appends job search link to match result email
- CI workflow updated to build and push myai-cv-search-job:staging image
- CLAUDE.md documentation added for all affected services

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

Apis/cv-matcher-api-models/Responses/CreateJobSearchTokenResponse.cs

@@ -0,0 +1,6 @@
+namespace CvMatcher.Models.Responses;
+
+public sealed class CreateJobSearchTokenResponse
+{
+    public string TokenId { get; set; } = string.Empty;
+}

Apis/cv-matcher-api-models/Responses/StartJobSearchResponse.cs

@@ -0,0 +1,14 @@
+namespace CvMatcher.Models.Responses;
+
+public sealed class StartJobSearchResponse
+{
+    public string Status { get; set; } = string.Empty;
+}
+
+public static class StartJobSearchStatus
+{
+    public const string Started = "Started";
+    public const string AlreadyUsed = "AlreadyUsed";
+    public const string Expired = "Expired";
+    public const string NotFound = "NotFound";
+}