feat(ttp): E.3.8 R0049-R0053 canary fingerprint cohort

5 YAMLs for the canary-fingerprint cohort per Appendix B / A.9:
navigator.webdriver flag, automation canvas/audio/WebGL hash match,
WebRTC IP leak, TZ/lang vs geo mismatch, platform inconsistency.
CanaryFingerprintLifter (E.3.11) consumes by rule_id.

test_canary_rules.py: YAML-present + inert-in-v0 + xfail(strict)
gated on E.3.11.

tests/ttp/rule_precision/test_canary_rules.py

@@ -0,0 +1,52 @@
+"""R0049-R0053 — canary fingerprint cohort.
+
+CanaryFingerprintLifter (E.3.11) parses the fingerprint payload
+(navigator/webdriver flag, canvas/audio/WebGL hashes, WebRTC IPs,
+TZ/language/geo composite) and emits per Appendix A.9. The v0
+:class:`RuleEngine` cannot navigate a structured fingerprint blob —
+these rules are inert under the regex matcher.
+"""
+from __future__ import annotations
+
+from collections.abc import Callable
+from pathlib import Path
+
+import pytest
+
+from decnet.ttp.impl.rule_engine import RuleEngine
+from decnet.ttp.store.base import RuleState
+from decnet.ttp.store.impl.filesystem import _parse_and_compile
+from tests.ttp.rule_precision.conftest import CorpusRow, make_event
+
+CohortLoader = Callable[[str], list[CorpusRow]]
+
+_RULE_IDS = [f"R{n:04d}" for n in range(49, 54)]
+
+
+@pytest.mark.parametrize("rule_id", _RULE_IDS)
+def test_rule_yaml_present(rule_id: str) -> None:
+    path = Path("rules/ttp") / f"{rule_id}.yaml"
+    assert path.exists(), f"missing YAML: {path}"
+    compiled = _parse_and_compile(path, RuleState())
+    assert compiled.rule_id == rule_id
+
+
+@pytest.mark.parametrize("rule_id", _RULE_IDS)
+async def test_lifter_bound_inert_in_v0(
+    rule_id: str,
+    precision_engine: RuleEngine,
+    corpus_loader: CohortLoader,
+) -> None:
+    fired: set[str] = set()
+    for row in corpus_loader("canary"):
+        tags = await precision_engine.evaluate(make_event(row))
+        fired.update(tag.rule_id for tag in tags)
+    assert rule_id not in fired
+
+
+@pytest.mark.parametrize("rule_id", _RULE_IDS)
+@pytest.mark.xfail(
+    strict=True, reason="impl phase E.3.11 (CanaryFingerprintLifter)",
+)
+def test_canary_rule_precision(rule_id: str) -> None:
+    pytest.fail(f"{rule_id}: CanaryFingerprintLifter not yet shipped (E.3.11)")