Improve tokenization of icd11 codes in redis index

[sainak]

icd11 diagnosis codes like RA01.1 are considered as 2 tokens if the string is indexed directly (ref)
so we need to escape the periods like this RA01\.1 before indexing

[Clemo97]

Hi @sainak I'd like to take on this issue

[Clemo97]

@sainak I just noticed that his issue might conflict with another issue by @DraKen0009 #1927

[ab1123]

If this issue is already not resolved, I would like to work on this issue!!
@sainak

[Clemo97]

If this issue is already not resolved, I would like to work on this issue!! @sainak

maybe we can work on it together

[rithviknishad]

@Clemo97 unassigning due to no activity. Feel free to take it up if you'd be making a PR to solve this issue.

[aparnacoronasafe]

@sainak Can you please take this up as a priority?