Add container::hooks::run_post_install — runs an app's declarative
post_install hooks against its own running container:
- Exec -> podman exec <container> <args…> (60s timeout-bounded)
- CopyFromHost -> resolve src against allowlist roots (<data_dir>/<app>
and /opt/archipelago), canonicalise + prefix-check (defeats symlink
escape), then podman cp <abs-src> <container>:<dest>
Best-effort + idempotent: a failed step is warned and skipped, never
fails the install — matching the legacy patch_indeedhub_nostr_provider
behaviour this replaces. Wired into install_fresh after the container is
up, so it runs only on a freshly created container (not plain start), and
re-applies on recreate-after-drift.
5 unit tests on resolve_copy_src (accept in-data-dir, reject absolute /
traversal / missing / symlink-escape). cargo test -p archipelago green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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