Messed up cache database when multiple samples containing the same file is requested

[AlkaidCheng]

from servicex import ServiceXSpec, General, Sample, deliver

def run_query(input_filename=None):
    import uproot
    #
    return uproot.open({input_filename: "CollectionTree"}).arrays(['EventInfoAux.eventNumber'])

filename = ("root://eosuser.cern.ch//eos/atlas/atlascerngroupdisk/phys-higgs/HSG1/MxAOD/h028/mc16a/Nominal/"
            "mc16a.PowhegPy8_bbH125.MxAODDetailedNoSkim.e6050_s3126_r9364_p4180_h028.root")

spec = ServiceXSpec(
    General=General(
        ServiceX="servicex-uc-af",
        Codegen="python",
        OutputFormat="root-file",
        Delivery="LocalCache",
    ),
    Sample=[
        Sample(
            Name="foo",
            XRootDFiles=[filename],
            Function=run_query
        ),
        Sample(
            Name="bar",
            XRootDFiles=[filename],
            Function=run_query
        )
    ]
)
deliver(spec)

This will give

{'foo': ['/tmp/servicex_chlcheng/1e39cdcb-8c78-46ac-9eee-9b23961d3c0e/_fb8d56b26c71d7760000ede59ac8cb59ead5b951364_p4180_h028.root'],
 'bar': ['/tmp/servicex_chlcheng/f62efa75-184a-490d-b77a-d77b5cda3db6/_fb8d56b26c71d7760000ede59ac8cb59ead5b951364_p4180_h028.root']}

Rerunning the request will give the error

File /pscratch/sd/c/chlcheng/local/miniconda/envs/ml-gpu/lib/python3.11/site-packages/servicex/query_cache.py:89, in QueryCache.get_transform_by_hash(self, hash)
     86     return None
     88 if len(records) != 1:
---> 89     raise CacheException("Multiple records found in db for hash")
     90 else:
     91     return TransformedResults(**records[0])

CacheException: Multiple records found in db for hash

[ponyisi]

High priority, will need to take a look ASAP.