Declare audit_quotes in the attest_response input schema

[karpovantonme]

What this changes

attest_response declares draft_text and audit_grounding in its input schema. The handler reads a third argument:

audit_quotes=bool(arguments.get("audit_quotes", False)),

Adds audit_quotes to the schema so a client can actually reach it.

Why

_handle_attest_response honours the flag, and its docstring points callers at it: "Callers that still want the whole-document quote audit can pass audit_quotes=True." No MCP client can. The property is not in the schema, so a model never learns it exists, and the call succeeds either way while silently running with the default. The quote audit is unreachable over MCP today.

Nothing in the handler changes; the description text is taken from the reasons already given in _handle_attest_response for why it defaults to off.

Checklist

• make test passes locally (offline, no live network in tests)
• New behaviour has a test; a fixed defect has a regression test
• No figure introduced that contradicts docs/canonical_numbers.md
• Citation strings come from stored fields, never constructed (R1–R3)
• If this touches publish.py, DB schemas, base_scraper.py or state/: it does not

tests/test_attest_response_schema.py fails on main and passes here.

The make test box is unchecked on purpose: I ran the two files that touch this area, not the full suite. mcp 2.0 breaks collection for your existing tests as well (AttributeError: 'Server' object has no attribute ...), so I pinned mcp<2 locally; requirements.txt currently says mcp>=1.27.0 with no upper bound, which may be worth a separate look.