feat(ttp): E.3.9 BehavioralLifter (R0031-R0040)

Reads pre-shaped session aggregates from TaggerEvent.payload and emits
techniques per Appendix A behavior tables. Per-rule predicates dispatch
on match.kind (lifter:behavioral_<name>); the lifter holds its own
RuleIndex watching the same RuleStore as the engine, so disable / clip /
TTL state reaches lifter-bound rules through the same atomic-swap path.

R0032/R0036/R0037/R0040 YAMLs had over-escaped regex strings (\\
instead of \\) — fixed in place.

Factory wired so default get_tagger() returns CompositeTagger with
BehavioralLifter shipped; remaining three lifters (E.3.10-E.3.12) land
in subsequent commits.

E.2.6 contract preserved via TolerantTagger: empty payload steady-state
yields [] with zero ERROR records. Disabled / clipped / expired state
verified.

rules/ttp/R0037.yaml

@@ -11,7 +11,7 @@ match:
   kind: lifter:behavioral_k8s_sa_token
   paths:
     - '/api/v1/namespaces/[^/]+/secrets'
-    - '/var/run/secrets/kubernetes\\.io/serviceaccount'
+    - '/var/run/secrets/kubernetes\.io/serviceaccount'
 emits:
   - tactic: TA0006
     technique_id: T1552