fix: enforce community cooldown per site

tests/test_community_cli.py

@@ -1,8 +1,10 @@
+import json
 from pathlib import Path
 
 import pytest
 
-from rf4_research.community_cli import enforce_fetch_interval, mark_fetch
+from rf4_research import community_cli
+from rf4_research.community_cli import enforce_fetch_interval, fetch_site_key, mark_fetch
 
 
 def test_fetch_cooldown_is_persistent_per_source(tmp_path: Path) -> None:
@@ -13,3 +15,19 @@ def test_fetch_cooldown_is_persistent_per_source(tmp_path: Path) -> None:
         enforce_fetch_interval("rf4map-point", state_file=state_file, now=1_000)
     enforce_fetch_interval("rf4posts-spot", state_file=state_file, now=1_000)
     enforce_fetch_interval("rf4map-point", state_file=state_file, now=2_800)
+
+
+def test_fetch_site_key_groups_endpoints_and_normalizes_www() -> None:
+    assert fetch_site_key("https://rf4-stat.ru/fishing/") == "rf4-stat.ru"
+    assert fetch_site_key("https://www.rf4-stat.ru/posts/") == "rf4-stat.ru"
+
+
+def test_failed_fetch_still_reserves_site_cooldown(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
+    state_file = tmp_path / "fetch-state.json"
+
+    def fail(_url: str) -> str:
+        raise OSError("offline")
+
+    monkeypatch.setattr(community_cli, "fetch_html", fail)
+    assert community_cli.main(["rf4db", "--state-file", str(state_file)]) == 1
+    assert "download.rf4db.com" in json.loads(state_file.read_text(encoding="utf-8"))