It cleans up after itself

What's Changed

• Issue 60.3: EnvStore abstraction with production and test stores by @leynos in #79
• Issue 84 send safe cluster handle by @leynos in #86
• Document shared_test_cluster_handle fixture by @leynos in #95
• Consolidate data-dir recovery into single pg_worker binary by @leynos in #81
• Update dependabot-automerge.yml by @leynos in #97
• Improve CLI arg validation: handle empty/unknown operations by @leynos in #88
• Expand unit/integration tests for pg_worker, including binary tests by @leynos in #89
• Plan/Implement: apply test worker limits in embedded Postgres bootstrap by @leynos in #96
• Extend TestCluster cleanup with CleanupMode (data/full/none) by @leynos in #98
• Add end-to-end test for partial PG data recovery and cleanup framework by @leynos in #101
• Build(deps): Bump actions/upload-artifact from 4.6.2 to 6.0.0 by @dependabot[bot] in #94
• Bump openssl-sys from 0.9.110 to 0.9.111 by @dependabot[bot] in #72
• Bump cap-std from 3.4.4 to 4.0.0 by @dependabot[bot] in #75
• Add root/pg_worker run info link by @leynos in #85
• Fix rustc E0277 by updating PATH worker discovery and tests by @leynos in #105
• Add v0.5.0 migration guide by @leynos in #106

Full Changelog: v0.4.0...v0.5.0