Eish zarah reading: five faces of strange fire, implementation gaps

Adds specs/eish_zarah_reading.md — chavruta analysis of eish zarah
(strange fire) as architectural concept. Identifies five patterns across
fiction canon (inaccessible source, restructuring gift, false god,
false unity, beautiful unchecked signal), maps to Torah structures,
and evaluates eight specific implementation gaps in the Shorashim system.

Key gaps identified: coupling trace (interpret.pl needs L1 grounding
field), self-reference loop (resolve.pl feeds own output without
detection), three forms of avodah zarah (only Form 1 implemented),
panim/achorai distinction (challenges don't mark text vs. inference),
severed floor (raw Korban not stored alongside processed).

Updates construction spec document registry.

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

specs/shorashim_construction.md

@@ -807,3 +807,4 @@ The complete Shorashim specification set:
 | **Materials Inventory** | Terumah list — what has been gathered | Status checklist, costs, critical path | Complete (needs update) |
 | **Structure, Not Content** | Shemot 25:18-22 — the cherubim and the voice between | Torah as structure (not content), structural requirements from commandments | Complete |
 | **Lo Ta'aseh Lekha** | Shemot 20:4, Devarim 4:15-19, Devarim 13 — the anti-override | Override sequence diagnosis, high-control markers, Pharaoh architecture, Exodus liberation, AI alignment boundary condition | Complete |
+| **Eish Zarah Reading** | Vayikra 10:1, 6:6 — strange fire vs. perpetual fire | Five faces of eish zarah across fiction canon, coupling trace, severed floor prohibition, three avodah zarah detectors, panim/achorai constraint | Complete |