fix: repo count 15→13, stale text, live ISO sources hook

- Fixed repo .pkgar count: 13 (was 15 claimed). Updated all docs.
- Fixed stage-only count: 23 (was 21).
- Removed last stale '9 KF6 reach image' text from bottom line.
- Removed stale '22 additional recipes need enablement' text.
- Live ISO path now depends on 'sources' target (archival parity
  with harddrive.img path).
- All counts now verified against actual repo artifacts.

mk/disk.mk

@@ -17,7 +17,7 @@ else
 	mv $@.partial $@
 endif
 
-$(LIVE_IMG): $(FSTOOLS) $(REPO_TAG)
+$(LIVE_IMG): $(FSTOOLS) $(REPO_TAG) sources
 ifeq ($(FSTOOLS_IN_PODMAN),1)
 	$(PODMAN_RUN) make $@
 else