[ci skip] f1-stream: add extractor framework with demo streams (Phase 3)

- BaseExtractor ABC with health_check method
- ExtractorRegistry with concurrent fan-out extraction
- ExtractionService with in-memory cache and background polling
- DemoExtractor with 3 public HLS test streams
- Adaptive polling: 5min during live sessions, 30min otherwise
- GET /streams, GET /extractors, POST /extract endpoints

stacks/f1-stream/main.tf

@@ -36,7 +36,7 @@ resource "kubernetes_deployment" "f1-stream" {
       }
       spec {
         container {
-          image = "viktorbarzin/f1-stream:v2.0.3"
+          image = "viktorbarzin/f1-stream:v3.0.0"
           name  = "f1-stream"
           resources {
             limits = {