Add unified tracker detection backend

- TrackerType enum (cookie, local_storage, session_storage, indexed_db, script, iframe)
- TrackerPattern model with EXACT + PREFIX matching for all types
- DetectedTracker model with upsert on conflict
- ReportDetectedTrackers service method handling cookies, storage, and resources
- POST /detected-trackers endpoint on cookie-banner v1 API
- buildSnapshot() now reads from tracker_patterns (cookie type only)
- Entity types registered (89, 90)

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/cookiebanner/snapshot.go

@@ -72,12 +72,15 @@ func sortConsentCategories(categories coredata.CookieCategories) {
 func buildSnapshot(
 	banner *coredata.CookieBanner,
 	categories coredata.CookieCategories,
-	allPatterns coredata.CookiePatterns,
+	allPatterns coredata.TrackerPatterns,
 ) coredata.CookieBannerVersionSnapshot {
 	sortConsentCategories(categories)
 
 	cookiesByCategory := make(map[gid.GID]coredata.CookieItems)
 	for _, p := range allPatterns {
+		if p.TrackerType != coredata.TrackerTypeCookie {
+			continue
+		}
 		cookiesByCategory[p.CookieCategoryID] = append(
 			cookiesByCategory[p.CookieCategoryID],
 			coredata.CookieItem{