docs: update coordinator guide for MCP changes [doc-updater]

[james-in-a-box]

docs: Update coordinator guide for MCP tool changes

Update docs/guides/coordinator.md to reflect changes from commit cbeede3 (PR #1058):

• Remove urgency and workflow_hint parameters from submit_task documentation — these were removed from the MCP tool schema
• Update get_status description to document enriched return data: coordinator state, pipeline details (id, repo, issue_number, created_at, mode), and recent messages (from_role, type, subject, timestamp)
• Add /run-workflow slash command section describing the new end-to-end guided workflow command added in sandbox/.claude/commands/run-workflow.md

Triggered by: #1058

Issue: none

Test plan:

• Review that submit_task table no longer lists urgency/workflow_hint as optional params
• Review that get_status description mentions pipeline details and recent_messages
• Review that /run-workflow section accurately describes the command behavior

Authored-by: egg

[egg-reviewer]

Documentation-only change — verified all three updates against the codebase:

1. submit_task parameter removal: Confirmed urgency and workflow_hint are no longer in the tool schema (orchestrator/mcp_tools.py lines 32-52). Doc correctly removes them from both the table and the parameters list.

2. get_status enriched description: Confirmed the tool returns coordinator state, pipeline details (id, repo, issue_number, created_at, mode), and recent messages (from_role, type, subject, timestamp) per orchestrator/mcp_tools.py lines 54-72, 241-263. Doc summary is accurate.

3. /run-workflow section: Confirmed against sandbox/.claude/commands/run-workflow.md — five phases (seed, submit, monitor, HITL, complete), 60-second polling, AskUserQuestion for HITL. All accurate.

No issues found.

— Authored by egg

[james-in-a-box]

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