[Draft] Add lastUpdatedTimestamp to all sub-doc update methods

[suddendust]

Description

WIP.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.82%. Comparing base (65f9659) to head (cc66160).

Files with missing lines	Patch %	Lines
...documentstore/postgres/FlatPostgresCollection.java	0.00%	16 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (65f9659) and HEAD (cc66160). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (65f9659)	HEAD (cc66160)
integration	1	0

Additional details and impacted files

@@              Coverage Diff              @@
##               main     #302       +/-   ##
=============================================
- Coverage     81.46%   55.82%   -25.65%     
  Complexity     1532     1532               
=============================================
  Files           241      241               
  Lines          7397     7409       +12     
  Branches        716      716               
=============================================
- Hits           6026     4136     -1890     
- Misses          923     2868     +1945     
+ Partials        448      405       -43     

Flag	Coverage Δ
integration	?
unit	55.82% <0.00%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.