Commit the vrend410 firmware asset + RE tooling; gitignore run artifacts

- vrend410.mng: the production firmware, a HARD dependency of the committed
  live pipeline (emu_main.py MAPS['vrend410'].fw loads it) -- the repo couldn't
  run the live renderer without it.
- txdn_probe.py / texstore_trace.py / texel_trace.py: standalone reverse-
  engineering probes (texture-source/DRAM-write/texel tracing) documenting the
  texid-binding and texel-format investigations.
- .gitignore: exclude the firmware-decomp run artifacts (emu860c.pyd rebuildable
  from source, *.log/*.pkl/*.png renderer outputs + caches), editor junk, and
  the game runtime state/logs written by running the pod.

Left untouched deliberately: the parallel Mech session's in-progress
restoration/source410/BT/{EMITTER,BTPLAYER}.CPP edits (theirs to commit) and
the tracked game runtime state (LAST.EGG/CTMIX.CFG etc. -- transient).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -15,3 +15,25 @@ __pycache__/
 
 # 4.10 source reconstruction build outputs (rebuild: bash restoration/source410/build410.sh all)
 /restoration/build410/
+
+# firmware-decomp build/run artifacts
+#   emu860c.pyd: rebuild via the gcc line in emu860c/emu860c.c's header
+#   *.log/*.pkl/*.png: renderer run outputs + caches (regenerated by the scripts)
+/emulator/firmware-decomp/emu860c/*.pyd
+/emulator/firmware-decomp/emu860c/*.log
+/emulator/firmware-decomp/emu860c/*.pkl
+/emulator/firmware-decomp/emu860c/*.png
+/emulator/firmware-decomp/igc_stream.bin
+
+# editor / build junk
+/restoration/.obj.obj
+/.finf/
+
+# game runtime state written by running the pod (logs, egg backups)
+/ALPHA_1/REL410/BT/LOG
+/ALPHA_1/REL410/BT/NN.LOG
+/ALPHA_1/REL410/BT/RUN.LOG
+/ALPHA_1/REL410/RP/NN.LOG
+/ALPHA_1/VWETEST/VGLTEST/REPORT/TEST.LOG
+/ALPHA_1/WEAPONLO.TXT
+/ALPHA_1/REL410/BT/TESTARN.EGG.pre_pilot