Damage economy RECONCILED: 3 stand-ins fixed, 3 paths confirmed authentic (task #60)

Full 5-path audit of the damage economy vs the decomp (5-finder +
adversarial-verify workflow), resolving the KB self-contradiction the
binary-coverage audit flagged.

CONFIRMED AUTHENTIC as-is (no change needed):
- Energy beam (emitter.cpp): damagePortion = authored DamageAmount x
  (charge/seekV)^2; the ctor x1e7 and fire x1e-7 cancel (_DAT_004bafbc
  dumped from the exe = x87 80-bit 1e-7 exactly).
- Autocannon (projweap.cpp): full authored DamageAmount from resource
  +0x19C delivered unmodified; the 0.0625 at :667 is the shooter's own
  gyro recoil, not the round.
- Zone-armor BASE model: damageLevel += amount x damageScale[type]
  (engine DAMAGE.cpp:379, called mechdmg.cpp:427), legs x0.5, 1.0=dead.

3 STAND-INS FIXED (all byte-verified against the decomp):
- A. mechdmg.cpp:451 -- read the phantom `stance` member (no binary
  offset, zero writers -> perma-0), so the leg-shot-out -> fall/death
  branch was DEAD. Now MovementMode() (mech+0x40, @part_012.c:6910).
- B. mechdmg.cpp:458 -- guarded the leg partial-failure graphic on the
  always-0 IsAirborne() stub where the binary calls IsDisabled()
  (@0049fb54 = movementMode 2||9). On a wreck the binary SUPPRESSES the
  write; the stub let it corrupt graphicAlarm 9->4/3 -- the task-#52
  wreck-graphic bug, now fixed AT SOURCE (was only masked by the
  IsMechDestroyed latch).
- C. mech4.cpp:1551 -- flat kShotDamage=12 fed as the kill-score
  damageAmount (the KB self-contradiction: task #8 claimed it retired,
  but it was live). The score handler @0x4c02e4 derives the whole kill
  award from it, so every kill scored identically regardless of weapon.
  Now lastInflictingDamage -- the real killing-blow magnitude, latched
  in TakeDamageMessageHandler (mech.cpp:624), mirroring the per-hit path
  (mech4.cpp:1207). The phantom `int stance` slot is reused for the new
  Scalar member (size-neutral, no layout shift); init 0 in the ctor.

DEFERRED (task #60-D, documented): the missile CLUSTER model -- the port
fires N flying rounds (net armor total authentic) vs the binary's ONE
missile with a random burstCount cluster roll (loses cluster variance +
single-zone concentration). Blocked on an OPEN decomp semantic (does
burstCount multiply armor or only the gyro kick? settle at FUN_004bef78
-> FUN_004be078 -> EXPLODE.cpp:209-210).

VERIFIED live: clean build; 2-node fight -> clean center-mass kill (no
crash, kills 0->1); [zone-armor] dump confirms per-zone armor 50-140 +
legs x0.5. NB the displayed POINTS score still reads 0 -- a SEPARATE
open gap (scoreAward + role/team/tonnage multipliers unwired); fix C
corrected the damage INPUT to that formula.

KB swept: open-questions.md (self-contradiction resolved + task #60
summary + deferred missile item), combat-damage.md (damageScale is
type-indexed not even/odd; task-#52 source fix; kill-score section),
RECONCILE.md (missile = ONE spawn not N), stale comments in mechweap.cpp
(SendDamageMessage is LIVE), mislanch.hpp, mechdmg.cpp (FUN_0049fb54 =
IsDisabled).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

game/reconstructed/mech.cpp

@@ -622,6 +622,10 @@ void
 	// WRITTEN -- a reconstruction gap; the natural authentic write site is
 	// this handler (every damage message carries the inflictor).  [T3]
 	lastInflictingID = message->inflictingEntity;
+	// task #60: latch the killing-blow magnitude alongside the attacker id so the
+	// kill score carries the REAL finishing-hit damage (mirrors the per-hit path
+	// mech4.cpp:1207 that already passes p.damage), not the flat kShotDamage=12.
+	lastInflictingDamage = message->damageData.damageAmount;
 
 	// THREAT feed (task #37, the recovered reticle Execute's ThreatVector
 	// attr 0xC): when the PLAYER takes a hit, push the attack direction --
@@ -1419,6 +1423,7 @@ Mech::Mech(
 	frameEntryWorldVelocity = Vector3D(0.0f, 0.0f, 0.0f);	// collision-damage guard snapshot
 	ramLastVictim    = 0;								// ram contact-edge state
 	ramContactLinger = 0.0f;
+	lastInflictingDamage = 0.0f;						// task #60: killing-blow magnitude (set on hit)
 	if (GroundReal() && GetCollisionVolumeCount() > 0
 		&& collisionTemplate != 0 && collisionVolume != 0)
 	{