[aledbf]

Three errors the code dropped, found during the comment cleanup (#59). One commit each.

fix(cli): stop/down report a failed container lookup. stop and down (Go-only commands) ignored the errors of the container lookup, of the inspect that follows it, and of os.Getwd.

• An engine that refused the list answered {"outcome":"success","result":"no-container-found"} with exit 0.
• A container that couldn't be inspected was stopped as a plain container, even if it belonged to a Compose project.
• Each case now ends in an error result. Tests: TestStopOrDownReportsALookupTheEngineRefused and TestStopOrDownReportsAContainerItCannotInspect (both fail on main).

fix(docker): no panic when the docker context can't be read. FindDockerDriverBuilder read the stdout of docker context inspect without checking the error. Run returns a nil result when the command doesn't start or the context is cancelled, so a Feature build on a docker-container builder could panic.

• The failure now counts as "no current context", and the first docker-driver builder is still chosen, as when buildx ls names none for the current context.
• This is Go-only behavior with no TS counterpart. Test: TestFindDockerDriverBuilderWhenTheContextCannotBeRead (panics on main).

fix(lifecycle): log why the user env probe failed. A probe that couldn't run left an empty environment and said nothing. TS (injectHeadless.ts runUserEnvProbe) also falls back to {}, but first writes the error with toErrorText; Go now does the same, through a new log.ToErrorText that reproduces TS's text (TestToErrorTextMatchesTheReference). TestProbedRemoteEnv now asserts the log line (fails on main).

Investigated, no change: finalStageName (falls back to the TS-identical regex path), the JSON log stringify failure (unreachable: Event always serializes) and jsonTruthy (only after V8-compatible validation; true routes to the parse error).

Validation (local)

• task lint: pass.
• task test:race with TMPDIR outside /tmp: pass.
• task parity:contract: 104 pass. The 2 read-configuration.features-configuration-local-feature-* cases fail locally because of a /tmp/.git on the dev machine (same on main).
• task test:e2e: everything passes except TestE2E_CABundle/container, which picked up another concurrent run's postCreateCommand (another URL and nonce) while other e2e runs shared the Docker daemon. It passes when run alone. This looks like an image-name collision between concurrent runs and is unrelated to this change.

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