add diamondMissing calculation to recomp state in bore and neftet

Sets diamondMissing = 100 - diamond scarabs in inventory (clamped to 0)
before loading recomp nav, so ah_recomp/ah_rarecomp can report missing
diamonds to Nyckelmonster.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

met/neftet.met

@@ -10993,7 +10993,33 @@ K
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+setvar[diamondMissing, 100 - getitemcountininventorybyname[`Diamond Scarab`]]
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+TABLE
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+ifthen[$diamondMissing < 0, `setvar[diamondMissing, 0]`]
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