[andaaron]

• Clients such as the Go storage HTTP client send versions=false and includeTrailingDelimiter=false as nonempty query values on Objects.List
• Parsing with type=bool (or bare truthiness) treats any nonempty string as true, so "false" incorrectly enabled those modes
• That made live-only lists return every generation, and trailing-delimiter placeholder objects appear in items when they should stay in prefixes
• Parse versions, includeTrailingDelimiter, and softDeleted as enabled only when the value is the string "true"; add unit coverage for both

Fixes #829

It's a good idea to open an issue first for discussion.

• Tests pass
• Appropriate changes to README are included in PR

See results:

================================================= test session starts ==================================================
platform linux -- Python 3.10.12, pytest-9.1.1, pluggy-1.6.0
rootdir: /home/andaaron/storage-testbench
configfile: pyproject.toml
collected 424 items

tests/test_acl.py ...........                                                                                    [  2%]
tests/test_bucket.py ......................                                                                      [  7%]
tests/test_bucket_grpc.py ...........                                                                            [ 10%]
tests/test_common.py ..........................................................                                  [ 24%]
tests/test_csek.py ............                                                                                  [ 26%]
tests/test_database.py ...............................                                                           [ 34%]
tests/test_echo.py ...............                                                                               [ 37%]
tests/test_error.py ..........                                                                                   [ 40%]
tests/test_grpc_server.py ................................................................................       [ 58%]
tests/test_iam.py ...                                                                                            [ 59%]
tests/test_object.py ......................                                                                      [ 64%]
tests/test_project.py .......                                                                                    [ 66%]
tests/test_proto2rest.py ....                                                                                    [ 67%]
tests/test_rewrite.py ........                                                                                   [ 69%]
tests/test_storage_control_stall.py ...                                                                          [ 70%]
tests/test_testbench_bucket.py ........                                                                          [ 71%]
tests/test_testbench_continue_after_fault_injection.py ....                                                      [ 72%]
tests/test_testbench_object_gzip.py .......                                                                      [ 74%]
tests/test_testbench_object_metadata.py .....                                                                    [ 75%]
tests/test_testbench_object_special.py .........                                                                 [ 77%]
tests/test_testbench_object_upload.py ..............                                                             [ 81%]
tests/test_testbench_object_xml.py ...                                                                           [ 81%]
tests/test_testbench_retry.py .......................................                                            [ 91%]
tests/test_testbench_root.py ...                                                                                 [ 91%]
tests/test_testbench_run.py ...                                                                                  [ 92%]
tests/test_testbench_startup.py ...                                                                              [ 93%]
tests/test_testbench_waitress.py ..                                                                              [ 93%]
tests/test_upload.py ...........................                                                                 [100%]

================================================= 424 passed in 47.58s =================================================

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