Merge pull request #383 from seattleflu/kp2023-data-dict-update

Update KP2023 ETL (parse-kp2023) to reflect data dictionary updates, and ingest ICD-10 codes for both the old (2018-2021) and new (2022-present) KP sample streams.

KP2023 Data dictionary update: Symptom columns now include other values besides 0/1 which indicate missingness (don't know, prefer not to answer). The symptom columns "unknown" and "no answer" have been removed.
To address this update, symptoms columns are now converted from numeric to binary (0 for no, 1 for yes, None for don't know or prefer not to answer).

KP2023 (2022-present sample stream) ICD-10 code ingestion: Update clinical ETL to add encounter reference to ICD-10 condition entries for KP2023 encounters. Previously, the encounter reference was missing from these entries, which caused them to be skipped by the FHIR ETL.

KP (2018-2021 sample stream) ICD-10 code ingestion: Update parse-kp to ingest comorbidity metadata for encounters that were part of the original KP sample stream.