Add Additional dbcp2 configs

[suddendust]

Description

This PR adds additional dbcp2 pool configurations as described here: https://commons.apache.org/proper/commons-dbcp/configuration.html

It also adds a minServerVersion driver config to avoid connection pinning as described here: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-proxy-pinning.html#rds-proxy-pinning.postgres

All of these configurations are optional, and the driver will assume defaults if they're not configured.

For this config:

        maxPoolSize =32
        minIdlePercent =100
        maxIdlePercent =100
        testOnBorrwo = false
        maxConnLifetime = "15 minutes"
        customParams {
          minServerVersion = "9.0"
        }

These are the logs:

2026-07-06 09:08:12.333 [main] DEBUG o.h.c.d.p.PostgresConnectionPool - Postgres connection pool properties - maxTotal: 32, maxIdle: 32, minIdle: 32, maxWaitMillis: 10000, testOnBorrow: null, testWhileIdle: null, timeBetweenEvictionRunsMillis: null, minEvictableIdleTimeMillis: null, maxConnLifetimeMillis: 900000, lifo: null

2026-07-06 09:11:30.007 [main] DEBUG o.h.c.d.m.c.p.PostgresConnectionConfig - Postgres JDBC properties - user=traceable_write, ApplicationName=entity-service, assumeMinServerVersion=9.0

[codecov]

Codecov Report

❌ Patch coverage is 49.15254% with 60 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.90%. Comparing base (c9d3e0a) to head (0d887ad).

Files with missing lines	Patch %	Lines
...config/TypesafeConfigDatastoreConfigExtractor.java	40.00%	12 Missing and 24 partials ⚠️
...documentstore/postgres/PostgresConnectionPool.java	27.27%	12 Missing and 12 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #317      +/-   ##
============================================
- Coverage     81.44%   80.90%   -0.54%     
- Complexity     1552     1579      +27     
============================================
  Files           242      242              
  Lines          7524     7626     +102     
  Branches        728      751      +23     
============================================
+ Hits           6128     6170      +42     
- Misses          943      967      +24     
- Partials        453      489      +36     

Flag	Coverage Δ
integration	80.90% <49.15%> (-0.54%)	⬇️
unit	55.35% <49.15%> (-0.20%)	⬇️

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[github-actions]

Test Results

  124 files  ±0    124 suites  ±0   37s ⏱️ -5s
  845 tests +3    844 ✅ +3  1 💤 ±0  0 ❌ ±0 
1 182 runs  +3  1 181 ✅ +3  1 💤 ±0  0 ❌ ±0 

Results for commit 0d887ad. ± Comparison against base commit c9d3e0a.