rename: The Armory -> The Reliquary; extend spec with essence + cross-over

Renaming: "Armory" read too militaristic for a séance app. Landed on "The
Reliquary" (not "The Threshold" — that name was already taken by the
landing-page back-link).

Spec addendum: added a visible essence currency (earned per summon, spent
on unlocks — distinct from the hidden favor score) and a fourth judgment
verdict, cross_over, for compassionately helping a genuinely benevolent
"stuck" spirit move on rather than just trusting or banishing it. Updates
workstreams B/C/E/F accordingly before any of them are dispatched.

README.md

@@ -67,7 +67,7 @@ the collectible layer sitting on top of the anomaly-detection plumbing:
 nothing about a spirit is user-authored, all of it comes from the same
 signature → LLM-mint → normalize pipeline that runs live during a séance.
 
-## The Armory
+## The Reliquary
 
 `/shop` is a waitlist page for **the Ultimate Quantum Box** — a proposed
 ESP32-P4/C6 handheld séance instrument (thermal camera, EMF whisker array,
@@ -158,7 +158,7 @@ frontend/
   src/i18n/          react-i18next init + en.json / es.json
 docs/superpowers/
   specs/             the design spec — note the live app now exceeds it
-                     (5 modes, not 4; the Codex, the Armory and the
+                     (5 modes, not 4; the Codex, the Reliquary and the
                      haunting layer are all further along than documented)
   plans/             the 7 implementation plans this repo was built from
 ```
@@ -380,7 +380,7 @@ Honestly, in order of confidence:
   the landing page's marketing grid yet.
 - **Cosmetic.** The frontend build ships one 871 KB JS chunk (Vite warns
   about it); code-splitting would help first paint but hasn't been done.
-- **Intentionally unfinished.** The Armory / Ultimate Quantum Box is a
+- **Intentionally unfinished.** The Reliquary / Ultimate Quantum Box is a
   waitlist only — no hardware exists, no payment is taken, and the page
   says so.