fix: correct capa/subscope-rule key in RuleMetadata.from_capa

`RuleMetadata.from_capa` used `rule.meta.get("capa/subscope", False)` and
`Field(False, alias="capa/subscope")`, but the actual key set by
`_extract_subscope_rules_rec` is `"capa/subscope-rule"`. This caused
`is_subscope_rule` to always be `False` in every `RuleMetadata` instance,
making downstream filters in `render/utils.py`, `render/vverbose.py`, and
`scripts/import-to-ida.py` ineffective (though subscope rules are already
excluded from `ResultDocument` before reaching those callers).

scripts/import-to-bn.py

@@ -102,7 +102,7 @@ def load_analysis(bv):
     for rule in doc["rules"].values():
         if rule["meta"].get("lib"):
             continue
-        if rule["meta"].get("capa/subscope"):
+        if rule["meta"].get("capa/subscope-rule"):
             continue
         if rule["meta"]["scopes"].get("static") != "function":
             continue