feat: audit infrastructure - actions, resolvers, and formatters

[paymonsattar]

Describe your changes

• Adds the foundation for granular audit trail entries.
• Audit templates now support metadata placeholders (old/new values, entity names, file names, folder names) resolved at display time, replacing the generic "X was updated" messages.
• Added dedicated resolvers for diffing complex entity types — contacts, inspectors, procedures, outcomes, related/linked cases — that compare old and new state by ID and produce specific audit entries for each added, updated, or deleted item and sub-field.
• Shared formatting utilities extracted for reuse across resolvers.

Issue ticket number and link

https://pins-ds.atlassian.net/browse/HRP-296

[oscargay]

Looks great, this is a very readable addition that I can see being easy to add new items to. Only a few comments, the main things are:

1. Some of the resolves are 1 long function and it could be nice to break them down a little more into sub functions
2. Overall this adds a layer of technical overhead, when adding a new feature a developer will need to know that they have to check & potentially add to the resolvers to get the audit to work, this is fine but we need some way of making sure that this doesn't slip through the cracks in future dev work - what do you think? It could be a documentation thing!

Great work!

[oscargay]

LGTM, nice!