test: юнит-тесты и сквозные тесты с Chrome (#21)

- tests/unit (make test, без браузера, ~5 с): схемы и валидация, /v1/solve с подменённым
  движком (коды ошибок, слоты, сессии, UA и cookies профиля, маскирование секретов в логах),
  действия, оркестратор антибота, профиль и отпечаток
- tests/browser (make test-browser, в Docker): example.com, UA один раз и замена cookies
  на httpbin, применение и стабильность отпечатка, прохождение Cloudflare
- requirements-dev.txt, make sync-dev; Makefile вызывает pip через python -m pip
  (у перенесённого .venv битый shebang bin/pip)
- fix: в CloudflareSolver вызов bounding_box() у неожиданной корутины — ветка без iframe
  всегда падала с AttributeError

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/unit/test_orchestrator.py

@@ -0,0 +1,90 @@
+"""Цикл detect → solve → verify в antibot.orchestrator на поддельном провайдере."""
+import pytest
+from patchright.async_api import Error as PlaywrightError
+
+from antibot import orchestrator
+from antibot.base import ChallengeInfo, Stage
+from antibot.exceptions import ProviderNotDetected
+
+pytestmark = pytest.mark.anyio
+
+
+class FakePage:
+	def __init__(self):
+		self.waits = []
+
+	async def wait_for_load_state(self, state):
+		pass
+
+	async def wait_for_timeout(self, ms):
+		self.waits.append(ms)
+
+
+class FakeProvider:
+	provider = "fake"
+
+	def __init__(self, detects, solve_error=None):
+		self.detects = list(detects)  # что вернуть/бросить на каждый detect
+		self.solve_error = solve_error
+		self.solves = 0
+
+	async def detect(self, page):
+		item = self.detects.pop(0) if len(self.detects) > 1 else self.detects[0]
+		if isinstance(item, Exception):
+			raise item
+		return item
+
+	async def solve(self, page, info):
+		self.solves += 1
+		if self.solve_error:
+			raise self.solve_error
+
+
+def info(success, stage=Stage.CHECKBOX):
+	return ChallengeInfo(stage=stage, provider="fake", success=success, meta={"reason": "done" if success else None})
+
+
+@pytest.fixture
+def use_provider(monkeypatch):
+	def install(provider):
+		async def select_one(page, name, **kwargs):
+			return provider
+		monkeypatch.setattr(orchestrator, "select_one", select_one)
+		return provider
+	return install
+
+
+async def test_not_requested():
+	outcome = await orchestrator.pass_challenges(None, FakePage())
+	assert outcome.cleared and outcome.reason == "antibot not requested"
+
+
+async def test_solved_after_one_step(use_provider):
+	provider = use_provider(FakeProvider([info(False), info(True)]))
+	outcome = await orchestrator.pass_challenges("fake", FakePage())
+	assert outcome.cleared and outcome.reason == "done"
+	assert provider.solves == 1
+
+
+async def test_detect_survives_navigation(use_provider):
+	"""Челлендж уходит на целевую страницу посреди detect — повторяем detect, а не падаем."""
+	destroyed = PlaywrightError("Page.query_selector: Execution context was destroyed, most likely because of a navigation.")
+	provider = use_provider(FakeProvider([destroyed, info(True)]))
+	outcome = await orchestrator.pass_challenges("fake", FakePage())
+	assert outcome.cleared
+	assert provider.solves == 0
+
+
+async def test_failing_solve_pauses_and_times_out(use_provider):
+	page = FakePage()
+	use_provider(FakeProvider([info(False)], solve_error=RuntimeError("click failed")))
+	outcome = await orchestrator.pass_challenges("fake", page, timeout_ms=50)
+	assert not outcome.cleared
+	assert outcome.reason == "timeout"
+	assert outcome.last_stage == Stage.CHECKBOX
+	assert page.waits and set(page.waits) == {orchestrator.SOLVE_RETRY_DELAY_MS}
+
+
+async def test_unknown_provider():
+	with pytest.raises(ProviderNotDetected, match="unknown captcha_type 'datadome'"):
+		await orchestrator.pass_challenges("datadome", FakePage())