fix(PPO_Bot): SIGSEGV crash fixes + static buffers for thread safety

- bullets: seq[InFlightBullet] → array[4, InFlightBullet] + bulletCount
  (eliminates cross-thread heap realloc under ORC)
- hasFired: edge-triggered (cleared after state build, not level-triggered)
- round_counter parseInt: wrapped for empty/torn file → 0
- Static SVG + intent buffers to kill cross-thread heap realloc
- Tick-local alive/bulletData also fixed arrays

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

PPO_Bot/PPO_Bot.sh

@@ -1,4 +1,7 @@
 #!/bin/sh
 # PPO_Bot — PPO-trained RL bot (compiled native binary)
+# OPENBLAS_NUM_THREADS=1: prevent OpenBLAS from spawning worker threads,
+# which deadlock when called from within a multi-threaded Nim bot process.
+export OPENBLAS_NUM_THREADS=1
 cd -- "$(dirname -- "$0")"
 exec "./PPO_Bot"