Add readme for gotchas in audit fields

[mahalakshme]

Need:

There are some cases with syncing of audit information which are not evident and hence which could be interpreted as bugs. Hence it is good to be documented with reasons for the behavior.

Analysis:

Below are the few things I know, that I think can be added to readme.

• With the already existing data, when user upgrades to 7.0, audit info for old data will not display
• With fresh sync with 7.0 - audit info for encounters alone will not display for old data
• And new data need to be synced, to see the user audit info.
• For encounter, date when filled is used, rather than created.

AC:

• Add the necessary info in readme, related to 'Sync of audit information' card.

[petmongrels]

https://avni.readme.io/docs/about-audit-information

Not added anything for transient situation which is app upgrade to 7.0 to keep it simple.

[mahalakshme]

I think one line can be added about - audit fields will be missing for all data(not only encounters) unless freshly synced

[AchalaBelokar]

@petmongrels Need to mention about edit individual, encounter type,