chore(main): release testcontainers 4.16.0-rc3

[github-actions]

🤖 I have created a release beep boop

4.16.0-rc3 (2026-06-06)

Features

• main: enable typing for complete package (237be27)
• main: make legacy imports available with deprecation notice (ab6cca8)
• test: start working on parallel-running tests (WIP!) (2d24429)

Bug Fixes

• arangodb: replace deprecated add_hash_index with add_persistent_index (50bb202)
• aws: wrong path of test (38089b0)
• ci: correct coverage paths (b21eccd)
• ci: fix community test selection (5287fc8)
• ci: ignore @overload in coverage (592c6d1)
• ci: ignore TYPE_CHECKING block in coverage (3bdc561)
• core/registry: use relative import for _LocalRegistryContainer (961e3d1)
• docs: update docs reflecting new structure (9427055)
• doctests: Ensure paths are correct (f777673)
• k3s: replace tmpfs dict kwarg with with_tmpfs_mount() (4d1da0c)
• keycloak: disable SSL requirement for master realm after start (2a85595)
• main: adopt ci to new src structure (dae421d)
• main: adopt imports to new structure (9155677)
• rabbitmq: declare queue as durable (2622736)
• ruff: add **/*_example.py to per-file-ignores for T201 (01dbd16)
• sftp: remove redundant start() calls and fix SSH connection options (54cef56)
• trino: increase default startup timeout from 30s to 60s (2940501)
• weaviate: update and fix module (5dd2aa1)

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