Skip badEntity.riddl in EBNF validators as include fragment

CI's ebnf-grammar-validation job (TatSu validator) walks every
`*.riddl` under `**/input/**` and tries to parse each one as a
standalone RIDDL file. `badEntity.riddl` is a context-level
fragment included by `badDomain.riddl` (and additionally
intentionally malformed to exercise the missing-`}` regression
in `TopLevelParserTest`), so it cannot be parsed standalone.

Added to `INCLUDE_FRAGMENTS` in both `ebnf_tatsu_validator.py`
and `ebnf_validator.py`, alongside the existing fragment skip
entries.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: reid-spencer

language/jvm/src/test/python/ebnf_tatsu_validator.py

@@ -51,6 +51,7 @@
     "588included.riddl",             # Fragment included by 588.riddl
     "foo.riddl",                     # Fragment in issues/584/Foo/
     "context-types.riddl",           # Context-level types for id-in-include test
+    "badEntity.riddl",                # Context-level fragment in riddl-bad/ (intentionally malformed; included by badDomain.riddl to exercise the missing-`}` error-reporter regression)
 }
 
 # Files that are intentionally invalid for testing error handling.

language/jvm/src/test/python/ebnf_validator.py

@@ -44,6 +44,7 @@
     "application.riddl",             # Context fragment in full/ and includes/
     "context.riddl",                 # Context fragment in full/
     "context-types.riddl",           # Context-level types for id-in-include test
+    "badEntity.riddl",                # Context-level fragment in riddl-bad/ (intentionally malformed; included by badDomain.riddl to exercise the missing-`}` error-reporter regression)
 }
 
 # Files that are intentionally invalid for testing error handling