feedback5 WE1: 庇护 is one effect per unit — 宴, 余, 缪尔赛思, 赫拉格, 左乐 and 赫德雷 join the shared key (follow-up 18)

gamedata_const ba.protect / PRTS 术语 庇护 "受到的物理和法术伤害降低相应比例（同名效果取最高）": the strongest source holds; the
自选 kits already used battle.applyStrongest('protect'), these six multiplied private cuts with it.

- kits/shared/tier1.js: PROTECT, protectMods, PROTECT_TICK_HOLD and holdProtect (applyStrongest on the shared key).
- 宴 / 赫拉格 / 左乐 (below their HP threshold): refreshed every tick and at each hit on them; 余 (blocking) and 缪尔赛思's
  melee copies at their old cadence; 赫德雷's 庇护 joins the key, his CRU-X 物理伤害 + becomes its own instance. 左乐 keeps the
  PRTS S2 ordering (his own 庇护 newer than his barrier cuts behind it); 行险 drops his own held 庇护 for its 0.1 s
  re-judgement [ASSUMED: another source's returns with its next refresh]. 遥's bubbles stay separate (the client's
  damage_resistance[bonus] multiplies with the common damage_resistance[inf]).

Golden: no scenario moved — no unit of the corpus holds two 庇护 at once, and one source alone cuts exactly as before.

Tests: test/content/feedback5-protect.test.js (new, 2); kits_t6 (余), kits_alt_t6 (缪尔赛思), op_hodrer updated to the
shared key; kits_t1t2, op_helage, op_zuole pass. Docs: SIM.md §3, kits/README.md checklist 9.

test/content/op_hodrer.test.js

@@ -20,7 +20,8 @@ const FORMS = BACKUPS.units[HOD].forms;
 const SLOT = { 5: 'chess_char_5_diy1_a', 6: 'chess_char_6_diy1_a' };
 const CRUX = 'uniequip_002_hodrer', CRUY = 'uniequip_003_hodrer';
 const S1 = 'skchr_hodrer_1', S2 = 'skchr_hodrer_2', S3 = 'skchr_hodrer_3';
-const PROTECT = 'talent:hodrer:protect';
+const PROTECT = 'protect';                 // the shared 庇护 of every source (kits/shared/tier1.js holdProtect)
+const DMG_UP = 'talent:hodrer:dmgUp';      // CRU-X stage 3's 物理伤害 + (its own one instance per ally)
 const formOf = (tier, elite) => FORMS[elite ? (tier === 5 ? '2/60/7/1' : '2/60/7/3') : '2/1/4/0'];
 const skillOf = (tier, elite, id) => formOf(tier, elite).skills.find((s) => s.skillId === id);
 const modOf = (tier, mod) => (mod ? formOf(tier, true).modules.find((m) => m.uniEquipId === mod) : null);
@@ -173,7 +174,7 @@ test('T2 余火之氅: he and the ally on the tile behind him get 18 % 庇护 (C
       assert.ok(m, `${label(f)}: ${a.def.charId} protected`);
       approx(m.physTakenMul, 1 - dr, `${label(f)}: phys`);
       approx(m.artsTakenMul, 1 - dr, `${label(f)}: arts`);
-      assert.equal(m.physDealtMul ?? 1, x3 ? 1.1 : 1, `${label(f)}: 物理伤害`);
+      assert.equal(a.findBuff(DMG_UP)?.mods.physDealtMul ?? 1, x3 ? 1.1 : 1, `${label(f)}: 物理伤害`);
     }
     assert.equal(beside.findBuff(PROTECT), null, `${label(f)}: not beside him`);
     const hp = behind.hp;