fix: dump oversized CLI output via YAML policy

scripts/src/gh.ts

@@ -7741,7 +7741,7 @@ export function ghHelp(): unknown {
       "issue view is the canonical GitHub CLI-compatible read path; read remains a UniDesk compatibility alias. View/read accept positional numbers, GitHub issue URLs, and owner/repo#number shorthand, deriving --repo unless an explicit conflicting --repo is supplied. --number is accepted on single issue/comment numeric target commands for low-friction compatibility and returns a standard syntax hint; list/create/scan-escape/cleanup-plan/board-audit/board-row list do not accept it. Comment delete treats --number as commentId, not an issue number. View supports lifecycle fields closed/closedAt plus legacy --json field selection; full body is included only when requested with --json body, --full, or --raw, and unsupported fields fail structurally.",
       "issue attachment list/download scan issue body and comments for GitHub user attachment URLs (`https://github.com/user-attachments/assets/...`). list is read-only and returns bounded attachment metadata. download writes the selected attachment to --output or /tmp/unidesk-gh-attachments, returns bytes/SHA-256/content-type/path, redacts redirected signed URL query parameters, and never prints binary bytes.",
       "--raw and --full are explicit full-disclosure aliases for gh issue list/read/view/update/edit/patch and gh pr list/read/view. For issue writes, default success output omits full issue.body and returns bodyChars/bodySha/bodyPreview plus readCommands; --full|--raw includes the full returned issue body only on commands that explicitly support full disclosure.",
-      "GitHub CLI output larger than 20 KiB is automatically written to /tmp/unidesk-cli-output/*.json; stdout stays bounded JSON with outputTruncated=true, the dump path, total bytes/lines, and head/tail previews.",
+      "CLI output larger than config/unidesk-cli.yaml output.maxStdoutBytes is automatically written to /tmp/unidesk-cli-output; stdout stays bounded with outputTruncated=true, warning text, dump file metadata, and drill-down read commands.",
       "issue create accepts --body-stdin or --body-file <file|-> plus repeatable --label values and comma-separated labels; inline --body is intentionally unsupported for issue creation. Dry-run prints the parsed labels and non-dry-run sends them in the GitHub REST create-issue payload.",
       "--body-stdin is the first-class heredoc/stdin source for Markdown bodies. Use quoted heredoc syntax such as bun scripts/cli.ts gh issue comment create 1 --body-stdin <<'EOF' so real newlines, backticks, and tables are read as stdin bytes instead of shell arguments.",
       "update defaults to --mode replace; --mode append reads the current body and appends file bytes so real newlines, backticks, and Markdown tables are preserved.",