Add Additional Telemetry to FlatPostgresCollection And SchemaRegistry

[suddendust]

Description

This PR adds some telemetry to calculate the time taken at various stages of update, bulkUpdate and PostresLazilyLoadedSchemaRegistry.

Testing

Tested on a local env

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

❌ Patch coverage is 91.30435% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.25%. Comparing base (5025ed7) to head (acd8fc4).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../postgres/PostgresLazyilyLoadedSchemaRegistry.java	84.21%	2 Missing and 1 partial ⚠️
...documentstore/postgres/FlatPostgresCollection.java	96.29%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #282      +/-   ##
============================================
+ Coverage     81.17%   81.25%   +0.07%     
- Complexity     1485     1486       +1     
============================================
  Files           240      240              
  Lines          7135     7176      +41     
  Branches        675      676       +1     
============================================
+ Hits           5792     5831      +39     
- Misses          914      916       +2     
  Partials        429      429              

Flag	Coverage Δ
integration	81.25% <91.30%> (+0.07%)	⬆️
unit	55.22% <63.04%> (+0.04%)	⬆️

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