feat(BNNBot): 44-bit encoding with sin/cos bearing+heading, distance%, velocity

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

BNNBot_garage/src/BNNBot.nim

@@ -1,5 +1,5 @@
 # BNNBot — binary encoding data collector.
-# Radar lock on enemy, converts each scan to a 50-bit BinaryVector, prints it.
+# Radar lock on enemy, converts each scan to a 44-bit BinaryVector, prints it.
 # No aiming, no firing — pure scan visualization for BNN research.
 
 import std/[math, os]
@@ -18,7 +18,6 @@ type
     hasLastPos:  bool
     velocity:    float   # signed velocity (from heading + speed)
     heading:     float   # enemy heading (degrees)
-    speed:       float   # enemy speed (units/tick)
     distance:    float
     tick:        int
 
@@ -27,7 +26,6 @@ method onScannedBot*(bot: BNNBot, e: ScannedBotEvent) =
   bot.enemyBearing = directionTo(bx, by, e.x, e.y)
   bot.distance     = distanceTo(bx, by, e.x, e.y)
   bot.heading      = e.direction
-  bot.speed        = abs(e.speed)
   bot.velocity     = e.speed   # signed: positive = forward, negative = reverse
   if bot.hasLastPos:
     discard  # velocity from e.speed is more accurate; position delta kept for future use
@@ -41,7 +39,6 @@ method onScannedBot*(bot: BNNBot, e: ScannedBotEvent) =
     distance: bot.distance,
     velocity: bot.velocity,
     heading:  bot.heading,
-    speed:    bot.speed,
   )
   let vec = encode(scan)
   echo $bot.tick, " ", formatBinary(vec)