TFIL: remove the virtual centre pillar from the shipped default; register j102 env reads

The default mover painted a 30/10 radiance blob on the arena centre even
though the arena has NO physical pillar there, creating a 4x4 tile
(144x144 px) exclusion zone over open centre floor. Set
PillarHotness/PillarRadiance to 0/0 in the shipped default (matching the
ring variant) and add TR_TFIL_PILLAR_ON=1 to restore the old 30/10 field
for A/B without a rebuild; registered in env_report.

Because the shipped default legitimately changed, the default-path parity
golden (fixtures/tfil_commit_default.golden) was regenerated from the NEW
default, with an explicit 'deliberate default change' note in the test so
a future failure is treated as a real regression.

Also register the three env reads job j102 added in common_libs/bitbrain
(TR_BITBRAIN_MODE / _DECAY_EVERY / _DECAY_SHIFT), which the env-report
guard was failing on.

Verification: test_env_report all green; test_tfil_commit_env 30/30.

ModularBot_garage/src/env_report.nim

@@ -256,6 +256,8 @@ proc printEffectiveValues(ctx: EnvReportContext) =
   emit("TR_TFIL_HEAT_TAU", $TfilHeatTau, sourceOf("TR_TFIL_HEAT_TAU"))
   emit("TR_TFIL_HEAT_POWER_GAIN", $TfilHeatPowerGain,
        sourceOf("TR_TFIL_HEAT_POWER_GAIN"))
+  emit("TR_TFIL_PILLAR_ON", onOff(PillarHotness > 0.0),
+       sourceOf("TR_TFIL_PILLAR_ON"))
 
   # ── ramming ───────────────────────────────────────────────────────────────
   emit("TR_RAM_OPPORTUNITY", onOff(RamOppEnabled), sourceOf("TR_RAM_OPPORTUNITY"))
@@ -381,6 +383,8 @@ proc knownEnvNames*(): seq[string] =
     BB_MEM_ENV, BB_GAINS_ENV, BB_N_ENV, BB_NADE_ENV, BB_RANGE_ENV, BB_LOG_ENV,
     BB_MIN_OBS_ENV, BB_WARMUP_ENV, BB_ADAPT_ENV, BB_CALIB_ENV, BB_DECAY_ENV,
     BB_DECAY_FRAC_ENV, BB_SEED_ENV, BB_RESET_ON_TARGET_ENV,
+    # common_libs/bitbrain (counted-SBC library) reads these inline; job j102
+    "TR_BITBRAIN_MODE", "TR_BITBRAIN_DECAY_EVERY", "TR_BITBRAIN_DECAY_SHIFT",
   ]
   # rack names are constructed from the prefix + gun table, not spelled out
   for g in RackGunNames:
@@ -404,6 +408,7 @@ proc knownEnvNames*(): seq[string] =
     "TR_TFIL_TILE_REPLAN", "TR_TFIL_COMMIT_TICKS", "TR_TFIL_NO_REV",
     "TR_TFIL_COMMIT_LOG",
     "TR_TFIL_HEAT_TIME", "TR_TFIL_HEAT_TAU", "TR_TFIL_HEAT_POWER_GAIN",
+    "TR_TFIL_PILLAR_ON",
     # harness vars (read by the test framework, inherited by the bot, so they
     # must NOT be reported as typos)
     "TR_SERVER_JAR", "TR_BATTLE_RUNNER", "TR_BATTLE_RUNNER_DIR",