[clinical-curation] Increase ICD-10 specificity (.9 unspecified -> specified forms)

[ArioMoniri]

src/syntha/fhir/codes.py currently uses unspecified .9 forms for most conditions (e.g. I10 for HTN, E11.9 for DM, I25.9 for IHD). Where the source flag carries enough info (DM_Komplikasyonlu -> E11.65 hyperglycemia, Iskemik_Kalp + recent MI flag -> I25.2 old MI), we should specify further. Need: an issue-comment with the mapping you'd recommend, or a PR.

[aerenkaradag]

This question has been consolidated into the aggregate clinician review table in #53. Future clinical-module / terminology / reference-range updates should preferably refer back to that aggregate review document.