Phase 1c: prune remaining dead functions, unused imports, quarantine Genesis

- uc480_camera: drop never-called _capture_paused/get_framerate (the
  hardware question _capture_paused encoded is now in KNOWN_ISSUES.md)
- t3r_protocol: drop read_reg/write_reg/decode_reg/Reg (commands never
  wired into the driver)
- bbd20x: drop _update0x0212 (never dispatched) and 8 of 9 unused
  trigger convenience wrappers; apt_constants: drop TriggerBitsStepper
  (servo-only rig)
- ruff --fix: 35 unused imports across all apps; drop unused T3R_BAUD
- genesis_core.py: quarantine warning header; docs/genesis_verification.md
  bench checklist for the 7 divergences vs tools/genesis_laser_gui.py

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

hardware/pybbd202/bbd20x.py

@@ -288,25 +288,6 @@ class ThorlabsServoDriver():
         self.am_moving[ch] = False
         return
 
-    def _update0x0212(self, msg):
-        '''
-            _update0x0212 - internal function that listens for CHANENABLESTATE
-            messages.
-        '''
-        if msg['source'] == 0x21:
-            ch = 0
-        elif msg['source'] == 0x22:
-            ch = 1
-        else:
-            raise ValueError("Wherever this message came from, it's WRONG!")
-
-        if msg['enable_state'] == 0x01:
-            self.am_enabled[ch] = True # enabled
-        elif msg['enable_state'] == 0x02:
-            self.am_enabled[ch] = False # disabled
-        else:
-            raise ValueError("Am I a joke to you? WTF did this even come from?!")
-
     # ── Axis control ─────────────────────────────────────────────
 
     def enable_axis(self, axis):
@@ -473,38 +454,6 @@ class ThorlabsServoDriver():
                                     destination=axis, source=0x01)
         return TriggerBitsServo(result['mode'])
 
-    def set_trigger_trigin_high(self, axis):
-        '''Set trigger input to logic high.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGIN_HIGH)
-
-    def set_trigger_trigin_relmove(self, axis):
-        '''Set trigger input to initiate a relative move.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGIN_RELMOVE)
-
-    def set_trigger_trigin_absmove(self, axis):
-        '''Set trigger input to initiate an absolute move.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGIN_ABSMOVE)
-
-    def set_trigger_trigin_homemove(self, axis):
-        '''Set trigger input to initiate a home move.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGIN_HOMEMOVE)
-
-    def set_trigger_trigout_high(self, axis):
-        '''Set trigger output to logic high.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGOUT_HIGH)
-
-    def set_trigger_trigout_inmotion(self, axis):
-        '''Set trigger output high while axis is in motion.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGOUT_INMOTION)
-
-    def set_trigger_trigout_motioncomplete(self, axis):
-        '''Set trigger output to pulse when motion completes.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGOUT_MOTIONCOMPLETE)
-
-    def set_trigger_trigout_maxvelocity(self, axis):
-        '''Set trigger output to pulse at max velocity.'''
-        self.set_trigger(axis, TriggerBitsServo.TRIGOUT_MAXVELOCITY)
-
     def set_trigger_trigout_maxv(self, axis):
         '''Set trigger output high + pulse at max velocity (TRIGOUT_MAXV).'''
         self.set_trigger(axis, TriggerBitsServo.TRIGOUT_MAXV)