fix(files): isolate archive workers and make handoff event driven

tests/test_archive_inspection_bounds.py

@@ -4,7 +4,7 @@ import tarfile
 import unittest
 from unittest.mock import patch
 
-from govoplan_files.backend.storage.archives import _safe_member_path, inspect_archive
+from govoplan_files.backend.storage.archives import _inspect_archive_content, _safe_member_path, inspect_archive
 from govoplan_files.backend.storage.common import FileStorageError
 from test_archives import _tar_bytes, _zip_bytes
 
@@ -38,21 +38,21 @@ class ArchiveInspectionBoundTests(unittest.TestCase):
         headers = _HeadersOnly(4)
         with patch("govoplan_files.backend.storage.archives._open_tar", return_value=headers):
             with self.assertRaisesRegex(FileStorageError, "too many entries"):
-                inspect_archive(b"fixture", filename="fixture.tar.gz", max_entries=2)
+                _inspect_archive_content(b"fixture", filename="fixture.tar.gz", max_entries=2)
         self.assertEqual(3, headers.seen)
 
     def test_tar_expanded_size_rejected_before_payload_decompression(self):
         headers = _HeadersOnly(1, size=100)
         with patch("govoplan_files.backend.storage.archives._open_tar", return_value=headers):
             with self.assertRaisesRegex(FileStorageError, "too large after extraction"):
-                inspect_archive(b"fixture", filename="fixture.tar.gz", max_expanded_bytes=10)
+                _inspect_archive_content(b"fixture", filename="fixture.tar.gz", max_expanded_bytes=10)
         self.assertEqual(1, headers.seen)
 
     def test_tar_ratio_rejected_before_payload_decompression(self):
         headers = _HeadersOnly(1, size=100)
         with patch("govoplan_files.backend.storage.archives._open_tar", return_value=headers):
             with self.assertRaisesRegex(FileStorageError, "expansion ratio"):
-                inspect_archive(b"fixture", filename="fixture.tar.gz", max_expansion_ratio=2)
+                _inspect_archive_content(b"fixture", filename="fixture.tar.gz", max_expansion_ratio=2)
 
     def test_derived_directories_are_included_in_entry_limit(self):
         for filename, payload in (("fixture.zip", _zip_bytes({"a/b/c/file.txt": b"x"})), ("fixture.tar.gz", _tar_bytes({"a/b/c/file.txt": b"x"}))):