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>

app/lib/data/models.dart

@@ -270,7 +270,7 @@ class Norm {
   final String? supersededNote;
 
   /// The actual paragraphs of the norm text, normalised by
-  /// `text.akoma_normalize` in live mode. In demo mode the
+  /// `text.akoma-normalize` in live mode. In demo mode the
   /// fixture quotes the public source verbatim under §5 UrhG
   /// (amtliche Werke).
   final List<NormParagraph> paragraphs;