feat(testing): gun rack gauntlet + analysis reports

- fix(ModularBot): onBulletHitBot → onBulletHit (real hits were never tracked)
- feat(ModularBot): per-round gun stats dump to /tmp/gun_stats.jsonl
- feat(ModularBot): gun selection counter per round
- fix(tests): adversary paths _garage suffix removed from 7 test files
- feat(tests): test_gauntlet_5bots.nim — 10-round gauntlet vs all 5 adversaries
- feat(tests): analyze_gun_stats.nim — JSONL parser for gun performance tables
- docs: gun_rack_analysis.md — full per-gun performance report
- docs: gun_rack_summary.md — TL;DR verdict table (keep/drop/tune)

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

ModularBot_garage/tests/test_modularbot_battle.nim

@@ -1,4 +1,4 @@
-import std/[os, unittest]
+import std/[os, sequtils, unittest]
 import test_framework/test_framework
 import test_framework/battle_result
 import test_framework/server_manager
@@ -56,10 +56,11 @@ suite "ModularBot basic battle":
     echo ""
 
     # Basic checks
+    let botNames = r.results.mapIt(it.name)
     check r.rounds.len == 1
     check r.results.len == 2
-    check "ModularBot" in r.bots
-    check "SittingDuck" in r.bots
+    check "ModularBot" in botNames
+    check "SittingDuck" in botNames
 
     # ModularBot should win
     var modularResult: BotResult