fix: Treat HTTP 429 as OK in health check

429 (Too Many Requests) means the endpoint is working correctly
and is protected by rate limiting - this is expected behavior
for /register endpoint.

- Add 429 to acceptable status codes (200, 302, 304, 429)
- Update legend to explain 429 means protection is working
- Apply to all health check endpoints

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -826,8 +826,9 @@ def health_full():
                 status = response.status_code
 
                 # 200 = OK, 302 = redirect (np. do logowania) = OK
+                # 429 = rate limited (endpoint działa, tylko ograniczony)
                 # 500 = błąd serwera, 404 = nie znaleziono
-                if status in (200, 302, 304):
+                if status in (200, 302, 304, 429):
                     results.append({
                         'endpoint': path,
                         'name': name,
@@ -8144,7 +8145,9 @@ def admin_health():
                 response_time = (datetime.now() - start_time).total_seconds() * 1000  # ms
 
                 # Determine status
-                if status_code in (200, 302, 304):
+                # 429 = rate limited (endpoint works, just protected)
+                # 403 = forbidden (endpoint works, requires auth)
+                if status_code in (200, 302, 304, 429):
                     status = 'ok'
                 elif status_code == 404:
                     status = 'not_found'
@@ -8227,7 +8230,7 @@ def api_admin_health():
             try:
                 response = client.get(path, follow_redirects=False)
                 status_code = response.status_code
-                ok = status_code in (200, 302, 304)
+                ok = status_code in (200, 302, 304, 429)  # 429 = rate limited, endpoint works
                 results.append({'path': path, 'name': name, 'status': status_code, 'ok': ok})
             except Exception as e:
                 results.append({'path': path, 'name': name, 'status': 500, 'ok': False, 'error': str(e)[:50]})

templates/admin/health_dashboard.html

@@ -456,6 +456,10 @@
                 <span class="endpoint-code ok">302</span>
                 <span>Redirect - przekierowanie (np. do logowania)</span>
             </div>
+            <div style="display: flex; align-items: center; gap: var(--spacing-xs);">
+                <span class="endpoint-code ok">429</span>
+                <span>Rate Limited - ochrona przed botami (działa!)</span>
+            </div>
             <div style="display: flex; align-items: center; gap: var(--spacing-xs);">
                 <span class="endpoint-code warning">403</span>
                 <span>Forbidden - brak uprawnień</span>