[ci skip] Add reverse proxy mode to f1-stream

Replace CPU-intensive headless Chrome + WebRTC pipeline with a
lightweight Go reverse proxy that strips anti-framing headers
(X-Frame-Options, CSP) and embeds streaming sites in iframes.

- New internal/proxy package with URL rewriting for HTML/CSS
- JS shim injection to intercept fetch/XHR/WebSocket/createElement
- Referer reconstruction for correct cross-origin auth (HLS streams)
- Inline iframe viewer preserving site navigation (not fullscreen overlay)

modules/kubernetes/f1-stream/files/internal/store/scraped.go

@@ -0,0 +1,63 @@
+package store
+
+import (
+	"fmt"
+	"time"
+
+	"f1-stream/internal/models"
+)
+
+func (s *Store) LoadScrapedLinks() ([]models.ScrapedLink, error) {
+	s.scrapedMu.RLock()
+	defer s.scrapedMu.RUnlock()
+	var links []models.ScrapedLink
+	if err := readJSON(s.filePath("scraped_links.json"), &links); err != nil {
+		return nil, err
+	}
+	return links, nil
+}
+
+func (s *Store) SaveScrapedLinks(links []models.ScrapedLink) error {
+	s.scrapedMu.Lock()
+	defer s.scrapedMu.Unlock()
+	return writeJSON(s.filePath("scraped_links.json"), links)
+}
+
+func (s *Store) GetScrapedLinkByID(id string) (models.ScrapedLink, error) {
+	s.scrapedMu.RLock()
+	defer s.scrapedMu.RUnlock()
+	var links []models.ScrapedLink
+	if err := readJSON(s.filePath("scraped_links.json"), &links); err != nil {
+		return models.ScrapedLink{}, err
+	}
+	for _, l := range links {
+		if l.ID == id {
+			return l, nil
+		}
+	}
+	return models.ScrapedLink{}, fmt.Errorf("not found")
+}
+
+func (s *Store) GetActiveScrapedLinks() ([]models.ScrapedLink, error) {
+	s.scrapedMu.RLock()
+	defer s.scrapedMu.RUnlock()
+	var links []models.ScrapedLink
+	if err := readJSON(s.filePath("scraped_links.json"), &links); err != nil {
+		return nil, err
+	}
+	healthMap := s.HealthMap()
+	now := time.Now()
+	var active []models.ScrapedLink
+	for _, l := range links {
+		l.Stale = now.Sub(l.ScrapedAt) > 7*24*time.Hour
+		if l.Stale {
+			continue
+		}
+		// Filter unhealthy scraped links. URLs not in healthMap are assumed healthy.
+		if healthy, exists := healthMap[l.URL]; exists && !healthy {
+			continue
+		}
+		active = append(active, l)
+	}
+	return active, nil
+}