plugins/container/v0.7.4

fix(plugins/container): recover interrupted containerd inspections

Preserve Info and Spec errors so an RPC deadline or cancellation cannot
publish incomplete startup metadata before the caller context observes it.
Return the unfinished full IDs for deferred recovery and let interrupted
deferred inspections retry instead of reporting success.

Add deterministic regression coverage for individual and combined Info/Spec
errors, healthy listing prefixes, deferred recovery, and non-context fallback.

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>