feat: ADR-0034 — history journal records err + replay parses/filters the journal

Replay (§3): run_replay parses <ts>|<status>|<source> journal records — runs ok, skips non-ok — while still accepting bare .commands scripts (prefix-detected so a | inside a bare command isn't misread). Fixes replay history.log, which died on line 1.

Journal failures (§1/§2): failed commands are recorded err via a new Action::JournalFailure, emitted by the pure-sync App for both parse failures and worker-execution failures (runtime appends best-effort, never fatal). Hydration reads all records so typo'd/rejected commands are recallable across sessions.

Amendment 1 — replay filters app-lifecycle commands: a working replay history.log exposed that the journal also records save as/load/new/export/import/rebuild/mode (which would panic the worker dispatch or abort replay). Replay now re-applies only schema/data writes and skips every app-lifecycle command + nested replay, classified by entry word so modal/incomplete forms (save as, bare mode) and quit skip uniformly rather than aborting. All skips continue (reversing the nested-replay refusal); import and nested replay warn. replay.error_nested removed; replay.skipped_import/_replay added; ReplayCompleted carries warnings. requirements.md U3/U4 updated; app-command runtime-failure journalling tracked as a follow-up.

1659 passing / 0 failing / 0 skipped / 1 ignored. Clippy clean.

src/friendly/strings/en-US.yaml

@@ -842,4 +842,10 @@ replay:
   # compose with `failed_at_line`'s `{error}` placeholder.
   error_could_not_open: "could not open `{path}`: {detail}"
   error_parse: "parse error: {detail}"
-  error_nested: "nested `replay` is not allowed inside a replay file"
+  # Skipped during replay (ADR-0034): app-lifecycle commands are
+  # not re-applied. Most skip silently; `import` and a nested
+  # `replay` warn because skipping them can leave the replayed
+  # state incomplete (imported data / the nested file's commands
+  # are not reconstructed).
+  skipped_import: "[skip] line {line}: `{command}` — replay does not re-import; the imported data is not reconstructed"
+  skipped_replay: "[skip] line {line}: nested `{command}` — its commands were not replayed"