Add database connection pooler

[DropSnorz]

Relates to #494

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 396746a1-ef46-4d15-8cc3-09ab24154a53

📥 Commits

Reviewing files that changed from the base of the PR and between 4fc40dd and af50d54.

📒 Files selected for processing (1)

• owlplug-client/src/main/java/com/owlplug/OwlPlug.java

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Walkthrough

The client datasource bean now uses HikariDataSource instead of DriverManagerDataSource, applies JDBC connection properties through Hikari setters, and configures minimum and maximum pool sizes.

Changes

Datasource pooling

Layer / File(s)	Summary
Configure Hikari datasource owlplug-client/src/main/java/com/owlplug/OwlPlug.java	Replaces DriverManagerDataSource with HikariDataSource, uses setJdbcUrl, username, and password configuration, and adds pool sizing settings.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding a database connection pooler.
Description check	✅ Passed	The description is brief, but it is related to the referenced issue and the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/connection-pool

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