feat(profiler/behave_shell): G.1 operational.objective

Per-command intent classification via the G.0 lexicon
(`destructive > persistence > exfil > lateral > recon` precedence);
majority vote across classified commands. Skip emission below
INTENT_MIN_COMMANDS=3 classified hits. Confidence 0.40 below
INTENT_FULL_CONFIDENCE_MIN=6, 0.60 above.

decnet/profiler/behave_shell/_features/__init__.py

@@ -31,6 +31,9 @@ from decnet.profiler.behave_shell._features.environmental import (
     shell_type,
     terminal_multiplexer,
 )
+from decnet.profiler.behave_shell._features.operational import (
+    objective,
+)
 from decnet.profiler.behave_shell._features.temporal import (
     escalation_pattern,
     exit_behavior,
@@ -81,4 +84,5 @@ FEATURES: tuple[FeatureFn, ...] = (
     locale,
     keyboard_layout,
     numpad_usage,
+    objective,
 )