Replace Blazor WASM page load with direct API endpoint for error acknowledgment

[Copilot]

Error acknowledgment links in email notifications currently point to a Blazor WASM page that loads the entire web application to make a single API call, causing slow load times.

Changes

API Layer

• Added GET /Jobs/AcknowledgeError/{acknowledgementCode:guid} endpoint that returns static HTML
• Endpoint calls existing AcknowledgeErrorAsync method, returns styled success/error page
• Marked [AllowAnonymous] for public access without authentication
• Logs exceptions server-side, displays generic error messages to users
• Kept existing POST endpoint for Blazor WASM backward compatibility

Email Link Generation

• ServiceChecker: Changed from {AppUrl}acknowledge-error/{code} to {ApiUrl}/Jobs/AcknowledgeError/{code}
• JobManager: Updated to use API endpoint format instead of app route

Example

Email links now go directly to API:

Before: https://app.example.com/acknowledge-error/abc123
After:  https://api.example.com/Jobs/AcknowledgeError/abc123

The GET endpoint returns a simple HTML page:

<div class="container">
  <div class="icon success-icon">✓</div>
  <h1>Error Acknowledged</h1>
  <p>The error has been successfully acknowledged.</p>
</div>

Database validation (job exists, not already acknowledged) remains unchanged in stored procedure [app].[Jobs_AcknowledgeError].

Original prompt

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This section details on the original issue you should resolve

<issue_title>Acknowledge link should not load full app</issue_title>
<issue_description>Takes forever since it has to load the web app. Should be a link directly to the API call for acknowledging, and return a static message rather than a link to the public site</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Acknowledge link should not load full app #37

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