fix(integrations): hermes honors SPECKIT_INTEGRATION_HERMES_EXTRA_ARGS (#3346)

HermesIntegration.build_exec_args routed argv[0] through
_resolve_executable() but never called _apply_extra_args_env_var(), so
the documented per-integration extra-args env hook was silently dropped
for hermes — the same class of bug fixed for cursor-agent in #3265.
Insert the hook after the base 'chat -Q' command and before Spec Kit's
canonical -m/--json/-s/-q flags (mirrors opencode), so operator args
can't displace or clobber the canonical flags.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/specify_cli/integrations/hermes/__init__.py

@@ -253,6 +253,11 @@ class HermesIntegration(SkillsIntegration):
         """
         args = [self._resolve_executable(), "chat", "-Q"]
 
+        # Operator-supplied SPECKIT_INTEGRATION_HERMES_EXTRA_ARGS go here —
+        # after the base command but before Spec Kit's canonical -m/--json/-s/-q
+        # flags — so they can't displace or clobber them (mirrors opencode).
+        self._apply_extra_args_env_var(args)
+
         if model:
             args.extend(["-m", model])
         if output_json: