feat(ModularBot): 6 guns, pattern matcher, melee modules, adversarial bots

- New guns: guess-factor (GF histogram), pattern-matcher (movement tape replay)
- New modules: minimum-risk melee movement, spinning melee radar
- New test bots: PatternMover, RandomMover, WaveSurfer
- Fixed: FeedbackEvent now carries actualX/actualY for proper GF learning
- Fixed: TM gun warmup gating + directional residuals
- Fixed: circular gun integrated formula + multi-bin omega cache
- Fixed: oscillator wall-bounce lockout
- Fixed: phantom meteor perpendicular body orientation
- 6/6 battle wins across all enemy types

common_libs/radars/melee_scan.nim

@@ -0,0 +1,17 @@
+## melee_scan.nim — Continuously spinning radar for melee.
+## Always returns max radar turn rate so all enemies get scanned periodically.
+## No state needed; stateless spin guarantees coverage regardless of enemy count.
+
+import ../radar_harness/radar_interface
+
+export radar_interface
+
+const MaxRadarTurnRate* = 45.0  ## deg/tick — Tank Royale hard limit
+
+type MeleeScanModule* = object
+
+proc initMeleeScan*(): MeleeScanModule = MeleeScanModule()
+
+proc computeScan*(m: MeleeScanModule, state: WorldState): float =
+  ## Always spin at max rate — guarantees full arena coverage every 8 ticks.
+  MaxRadarTurnRate