feedback1 integrate: docs for the batch 6 QA residuals (DESIGN §21.20-§21.25, SIM, META, PLAYING, research 04, CHANGELOG)

The hammer lock per deployment for borrowers and in-place revives (both [ASSUMED] where no source decides), 卢西恩 / 锏
casting for an airborne 蒂比, rule 3 for a summon that is gone, the dispatcher snapshot taken before the first item;
PLAYING and CHANGELOG no longer say every debuff misses an airborne 蒂比 (ground-enemy auras and counters still reach
her); research 04's hammer line says once per deployment. docs-consistency pins it.

docs/research/04-items.md

@@ -201,7 +201,7 @@ Param names below are the keys of `items[].normal.params` / `items[].golden.para
 
 ### SURVIVAL - 生存 Survival (taunt, shields, undying, revive, DR, CC-immunity)
 
-- **坚固维式重锤** (`chess_item_3_09_e_a`, TIII, 2) - ATK% += atk. First time per battle carrier would take lethal damage: HP cannot drop below 1 for undeadable_duration s.  
+- **坚固维式重锤** (`chess_item_3_09_e_a`, TIII, 2) - ATK% += atk. The first lethal damage of each deployment (the text says only 首次; once per deployment is the user's first-hand memory of the official mode, 2026-10-03 — DESIGN §21.21): HP cannot drop below 1 for undeadable_duration s.  
   params: `atk=0.25/0.45, undeadable_duration=8.0`; buff keys: `env_gbuff_new_with_verify, env_gbuff_new_with_verify`
 - **蜂鸣器** (`chess_item_4_02_e_a`, TIV, 1) - tauntLevel = 1 (enemies prefer this unit as target); maxHP% += max_hp.  
   params: `taunt_level=1.0, max_hp=0.4/0.6`; buff keys: `env_gbuff_new_with_verify, env_gbuff_new_with_verify`