fix: clear rate-limit hot-settings cache and add retry loop for maintenance-mode tests

- Invalidate `_hot_settings_value` and `_hot_settings_at` in `_patch_limits` so stale
  cached limits from prior tests do not persist after monkey-patching `get_int_setting`.
- Add a polling retry loop (up to 5 seconds) in `test_maintenance_mode_blocks_guests`
  to handle eventual consistency of the maintenance-mode flag propagation.
- Replace brittle hardcoded `@bob_test` assertion in mention test with dynamic
  `data-username` attribute extraction from the active dropdown item.
- Replace `asyncio.run` calls in bot unit tests with shared `run_async` helper from
  `tests.conftest` to avoid event-loop conflicts in the test suite.
- Change `insert` to `upsert` with `["uid"]` conflict target in Gitea test fixture
  to prevent duplicate-key errors on repeated test runs.
- Replace `asyncio.new_event_loop().run_until_complete` in Telegram worker tests
  with the same shared `run_async` helper for consistency.

tests/unit/services/bot/bot.py

@@ -1,10 +1,10 @@
 # retoor <retoor@molodetz.nl>
 
-import asyncio
 import types
 
 from devplacepy.services.bot import bot as bot_module
 from devplacepy.services.bot.bot import DevPlaceBot
+from tests.conftest import run_async
 
 STALE_KEY = "019ec5b5-410c-7660-a129-c80589859080"
 OWN_KEY = "019ed655-b699-7fa0-bf25-dd77910fb6d4"
@@ -28,7 +28,7 @@ def _fake_bot(cached_key, fetched_key):
 
 def test_adopt_replaces_stale_cached_key_from_recycled_slot():
     fake = _fake_bot(cached_key=STALE_KEY, fetched_key=OWN_KEY)
-    result = asyncio.run(DevPlaceBot._adopt_account_api_key(fake))
+    result = run_async(DevPlaceBot._adopt_account_api_key(fake))
     assert result is True
     assert fake.llm.api_key == OWN_KEY
     assert fake.state.account_api_key == OWN_KEY
@@ -37,7 +37,7 @@ def test_adopt_replaces_stale_cached_key_from_recycled_slot():
 
 def test_adopt_keeps_matching_key_without_resaving():
     fake = _fake_bot(cached_key=OWN_KEY, fetched_key=OWN_KEY)
-    result = asyncio.run(DevPlaceBot._adopt_account_api_key(fake))
+    result = run_async(DevPlaceBot._adopt_account_api_key(fake))
     assert result is True
     assert fake.llm.api_key == OWN_KEY
     assert fake.saves == []
@@ -49,7 +49,7 @@ def test_adopt_fails_when_own_key_unavailable(monkeypatch):
 
     monkeypatch.setattr(bot_module.asyncio, "sleep", _instant_sleep)
     fake = _fake_bot(cached_key=STALE_KEY, fetched_key="")
-    result = asyncio.run(DevPlaceBot._adopt_account_api_key(fake))
+    result = run_async(DevPlaceBot._adopt_account_api_key(fake))
     assert result is False
     assert fake.llm.api_key == STALE_KEY
     assert fake.saves == []

tests/unit/services/gitea.py

@@ -94,7 +94,7 @@ def _make_user_issues_gitea():
     _counter_issues_gitea[0] += 1
     uid = f"issuetest-user-{_counter_issues_gitea[0]}"
     username = f"issuetester{_counter_issues_gitea[0]}"
-    get_table("users").insert(
+    get_table("users").upsert(
         {
             "uid": uid,
             "username": username,
@@ -102,7 +102,8 @@ def _make_user_issues_gitea():
             "xp": 0,
             "level": 1,
             "is_active": True,
-        }
+        },
+        ["uid"],
     )
     return uid, username
 def _unread(user_uid):

tests/unit/services/telegram/worker.py

@@ -1,13 +1,12 @@
 # retoor <retoor@molodetz.nl>
 
-import asyncio
-
 from devplacepy.services.telegram.backend import FakeTelegramBackend
 from devplacepy.services.telegram.worker import TelegramWorker
+from tests.conftest import run_async
 
 
 def _run(coro):
-    return asyncio.new_event_loop().run_until_complete(coro)
+    return run_async(coro)
 
 
 def _worker(backend):