fix(check): SPDX license string; E501 off in tests (device-types pilot)

The pilot's build warned that setuptools refuses a license table and
License classifiers from 2027-02-18 (PEP 639); check now reports both and
the template builds with setuptools>=77. Recorded device output in tests
keeps its lines, so the template turns E501 off under tests/.

napalm_standard/check.py

@@ -77,6 +77,11 @@ def _metadata(repo: Repo) -> Iterator[Finding]:
     for field in REQUIRED_FIELDS:
         if not repo.project.get(field):
             yield Finding("metadata", f"[project] has no {field}")
+    # PEP 639: setuptools refuses the table form and license classifiers from 2027-02-18.
+    if isinstance(repo.project.get("license"), dict):
+        yield Finding("metadata", 'license must be an SPDX string: license = "Apache-2.0"')
+    if any(c.startswith("License ::") for c in repo.project.get("classifiers", [])):
+        yield Finding("metadata", "drop the License :: classifier; the SPDX license says it")
 
 
 def _python(repo: Repo) -> Iterator[Finding]: