dlt/faultline/bulk

Bulk-update Faultline error groups via the bulk_update_error_groups MCP tool.

1. Parse $ARGUMENTS:

• First token: action — one of resolve, unresolve, ignore, delete.
• Remaining tokens: a comma-separated list of integer ids. Strip whitespace.
• If either is missing, ask the user to clarify before calling the tool.

1. Show the user what's about to happen: action: <action>, ids: [<list>], count.
2. Ask for confirmation. For delete, require an explicit "yes delete" — same standard as the delete skill, because this is irreversible and acts on N groups at once.
3. On confirmation, call bulk_update_error_groups with ids (array of ints) and action.
4. Report the response:

• affected — how many groups were actually updated.
• missing_ids — ids the user supplied that don't exist. Flag these so they know which ones were skipped.

If many ids are involved, suggest running /triage instead — that walks the user through one group at a time with per-group context.

If the tool returns error: "Tool disabled: mcp_readonly is true", tell the user to set c.mcp_readonly = false in their Faultline initializer.