fix(store): dash capability IDs + .chain bundles (chain catalog conformance)

chain's catalog charset (naming.rs check_segment, capability-namespaces.yaml)
allows only [a-z0-9-] per dot-segment — underscores are rejected by
`chain validate`. Repack all 8 modules with the dash capability form
(econ.skm-score, law.benefit-score, …) and align the store index, flows,
app strings and docs to match. Bundles now use the .chain extension
(content-addressed; legacy .fai would still install).

- store/store.yaml: name: dash, wasm_url .chain, refreshed sha256
- store/SHA256.txt: 8 new .chain hashes
- flows + app/lib + RUN.md + MACHBARKEITSSTUDIE.md: capability refs _ -> -
- left untouched: text_akoma_normalize.wasm artifact, DB field skm_score,
  backlog module law.skm_score

Signed-off-by: flemming-it <sf@flemming.it>

RUN.md

@@ -121,10 +121,10 @@ Selber Aufruf für die anderen sieben Verzeichnisse.
 
 ```bash
 chain serve &
-chain install text.akoma_normalize text.deontic_extract \
-              graph.citation_extract text.readability_score \
-              stats.cohort_size graph.shapley_attribution \
-              econ.skm_score law.benefit_score \
+chain install text.akoma-normalize text.deontic-extract \
+              graph.citation-extract text.readability-score \
+              stats.cohort-size graph.shapley-attribution \
+              econ.skm-score law.benefit-score \
               http.request system.approval
 chain run flows/durchstich-gewo-14.yaml \
   --input norm_url=https://www.gesetze-im-internet.de/gewo/__14.xml \
@@ -144,4 +144,4 @@ keine UI-Änderung nötig.
 - DESTATIS GENESIS-API-Adapter (Woche 4)
 - Juristen-Approval-Backend-Anbindung (Woche 5)
 - Volle Akoma-Ntoso-Konvertierung (v0.2)
-- HTML- und FORMEX-Adapter für `text.akoma_normalize` (v0.2/0.3)
+- HTML- und FORMEX-Adapter für `text.akoma-normalize` (v0.2/0.3)