fix(daemon): add missing CLI commands to agent instructions

Add 5 missing commands to buildMetaSkillContent() so agents can
discover them:

Read:
- workspace members — query member IDs for mentions
- repo checkout — listed in command reference, not just prose

Write:
- issue create — create sub-issues and new tasks
- issue assign — assign/unassign issues
- issue comment delete — remove erroneous comments

server/internal/daemon/execenv/runtime_config.go

@@ -49,13 +49,18 @@ func buildMetaSkillContent(provider string, ctx TaskContextForEnv) string {
 	b.WriteString("- `multica issue list [--status X] [--priority X] [--assignee X] --output json` — List issues in workspace\n")
 	b.WriteString("- `multica issue comment list <issue-id> --output json` — List all comments on an issue (includes id, parent_id for threading)\n")
 	b.WriteString("- `multica workspace get --output json` — Get workspace details and context\n")
+	b.WriteString("- `multica workspace members [workspace-id] --output json` — List workspace members (user IDs, names, roles)\n")
 	b.WriteString("- `multica agent list --output json` — List agents in workspace\n")
+	b.WriteString("- `multica repo checkout <url>` — Check out a repository into the working directory (creates a git worktree with a dedicated branch)\n")
 	b.WriteString("- `multica issue runs <issue-id> --output json` — List all execution runs for an issue (status, timestamps, errors)\n")
 	b.WriteString("- `multica issue run-messages <task-id> [--since <seq>] --output json` — List messages for a specific execution run (supports incremental fetch)\n")
 	b.WriteString("- `multica attachment download <id> [-o <dir>]` — Download an attachment file locally by ID\n\n")
 
 	b.WriteString("### Write\n")
+	b.WriteString("- `multica issue create --title \"...\" [--description \"...\"] [--priority X] [--assignee X] [--parent <issue-id>] [--status X]` — Create a new issue\n")
+	b.WriteString("- `multica issue assign <id> --to <name>` — Assign an issue to a member or agent by name (use --unassign to remove assignee)\n")
 	b.WriteString("- `multica issue comment add <issue-id> --content \"...\" [--parent <comment-id>]` — Post a comment (use --parent to reply to a specific comment)\n")
+	b.WriteString("- `multica issue comment delete <comment-id>` — Delete a comment\n")
 	b.WriteString("- `multica issue status <id> <status>` — Update issue status (todo, in_progress, in_review, done, blocked)\n")
 	b.WriteString("- `multica issue update <id> [--title X] [--description X] [--priority X]` — Update issue fields\n\n")