chore: bump container images to sha-18f19e1 / sha-0385cea

[DavidCozens]

Purpose

Prerequisite for E3 TLS transport (first story: S3.7). The new `SolidSyslogPosixTlsStream` component will link against libssl/libcrypto, so both compiler containers now ship `libssl-dev` (headers + linker symlinks).

Change Description

• `cpputest`: `sha-6acaccf` → `sha-18f19e1` (brings in libssl-dev via CppUTestDocker#1)
• `cpputest-clang`: `sha-6ea3f95` → `sha-0385cea` (brings in libssl-dev via CppUTestDockerClang#1)

Also corrects drift in `docs/containers.md` — it had `sha-e7aa8a1` listed for `cpputest` while `.devcontainer/docker-compose.yml` and `.github/workflows/ci.yml` actually used `sha-6acaccf`.

No Windows / BDD-Windows / Behave container references changed — only the Linux compiler-container jobs (`build-and-test`, `clang-build-and-test`, `sanitize`, `coverage`, `tidy`, `format`, `cppcheck`) and the two devcontainer compose services.

Test Evidence

After recreating the `gcc` and `clang` compose services on the new images, the full local preset gauntlet is green:

• Verified OpenSSL dev files present in both new images (`libssl-dev 3.0.19-1~deb12u2`, `/usr/include/openssl/ssl.h`, `/usr/lib/x86_64-linux-gnu/libssl.so`)
• `debug` — 582 tests passed
• `clang-debug` — 582 tests passed
• `sanitize` (ASan + UBSan) — 582 tests passed
• `coverage` — 99.9% overall (1108/1109 lines), 100% functions
• `tidy` (clang-tidy, all warnings-as-errors) — clean
• `cppcheck` — clean
• `format` (clang-format dry-run with `-Werror`) — clean
• `bdd` (behave + syslog-ng) — 15 features / 32 scenarios / 168 steps passed

Areas Affected

• Devcontainer — `gcc` and `clang` services. A "Dev Containers: Rebuild Container" is required locally on merge.
• CI — all seven Linux container jobs run against the new images.
• `docs/containers.md` — image-tag table brought back in sync.
• No runtime behaviour change; no production code touched.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores

  • Updated container images for development and continuous integration environments to newer pinned versions.

• Documentation

  • Updated container image references in documentation to reflect the latest versions.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 7bec2165-bc7c-48d6-9bd5-079e8b280520

📥 Commits

Reviewing files that changed from the base of the PR and between d1c04b3 and 1419401.

📒 Files selected for processing (3)

• .devcontainer/docker-compose.yml
• .github/workflows/ci.yml
• docs/containers.md

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📝 Walkthrough

Walkthrough

This pull request updates pinned container image SHAs for the cpputest and cpputest-clang GitHub Container Registry images across the dev container, CI workflows, and documentation. The GCC image SHA is updated to sha-18f19e1 and the Clang image SHA to sha-0385cea.

Changes

Cohort / File(s)	Summary
Container Image Updates .devcontainer/docker-compose.yml, .github/workflows/ci.yml, docs/containers.md	Updated pinned container image SHAs: cpputest from sha-6acaccf to sha-18f19e1 and cpputest-clang from sha-6ea3f95 to sha-0385cea.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

A rabbit hops through registries bright,
New SHAs pinned, containers tight!
From old to new, the images dance,
With gcc and clang in perfect stance. 🐰✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change—bumping container images to specific SHA values—and is concise and specific.
Description check	✅ Passed	The description covers all required sections: Purpose (links to prerequisite story), Change Description (specific image updates and rationale), Test Evidence (comprehensive testing), and Areas Affected (clear scope).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/bump-container-image-libssl

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[github-actions]

☀️   Quality Summary

   🚦   Unit Tests (GCC): 99% successful (✔️ 589 passed, 🙈 3 skipped)
   🚦   Unit Tests (Clang): 99% successful (✔️ 543 passed, 🙈 3 skipped)
   🚦   Unit Tests (Sanitize): 99% successful (✔️ 543 passed, 🙈 3 skipped)
   🚦   BDD Tests (Linux): 100% successful (✔️ 32 passed)
   🚦   BDD Tests (Windows): 66% successful (✔️ 21 passed, 🙈 11 skipped)
   🚦   Unit Tests (MSVC): 100% successful (✔️ 433 passed, 🙈 1 skipped)
   ⚠️   Clang-Tidy: No warnings
   ⚠️   CPPCheck: No warnings

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Created by Quality Monitor v1.14.0 (#f3859fd). More details are shown in the GitHub Checks Result.