feat: add pg_stat_statements extension for improved query performance…

[DanielPopoola]

… monitoring

Summary by CodeRabbit

• Chores
  • Removed automated load testing infrastructure.
  • Added PostgreSQL extension for database query monitoring capabilities.

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[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

The pull request removes the GitHub Actions load test workflow and adds the pg_stat_statements PostgreSQL extension to the database schema migration for query performance monitoring.

Changes

Cohort / File(s)	Summary
Load Test Workflow Removal .github/workflows/loadtest.yml	Entirely removed the manual GitHub Actions workflow that orchestrated SSH-based VPS deployment, k6 load test execution with scenario selection, and cleanup.
Database Schema Enhancement internal/infra/migrate/sql/000001_initial_schema.up.sql	Added pg_stat_statements PostgreSQL extension for query performance statistics and monitoring.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 A workflow takes its final bow,
While postgres stats emerge right now,
With pg_stat_statements in place,
Performance metrics light the space! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding the pg_stat_statements PostgreSQL extension for query performance monitoring, which is reflected in the SQL migration file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch go-version

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