feat(v0.8.44): SWE-bench adapter, markdown table fix, contributor sync, receipt truncation fix

- SWE-bench: codewhale swebench run/export writes prediction JSONL
  from working-tree diff, with untracked-file inclusion via git add -N
- CLI: --workspace / -C global flag forwards to TUI for file ops
- CLI: codewhale exec --auto semantics clarified in help text
- Markdown: table pipes inside inline code no longer create phantom columns
  (split_table_cells with backtick-awareness)
- Receipt: floor_char_boundary prevents multibyte UTF-8 slice panic
- Contributors: Ling (LING71671 #1839 #1911), Ben Younes (ousamabenyounes #1938),
  jeoor npm fix (#1860) credited across all 3 READMEs
- ja-JP README: 19 contributors synced to parity with EN/zh-CN (80 each)
- Docs: SWEBENCH.md, RECURSIVE_SELF_IMPROVEMENT.md, MODES.md exec clarification
- Sub-agent footer: Alt+V hint now says 'details' not 'raw'

.gitignore

@@ -95,6 +95,10 @@ apps/
 # Maintainer-internal design notes (trade-secret material, never published)
 .private/
 
+# Maintainer-local SWE-bench scratch (instance workspaces, venvs, predictions,
+# Docker harness logs). Never published.
+.swebench/
+
 # Agent handoffs and version-specific setup plans are working-state notes, not
 # public docs. Keep durable setup guidance in docs/runbooks instead.
 docs/*HANDOFF*.md