fix(mcp): correct inheritance order, compositor flattening, and nested attributeGroup walk

Three Phase 4 query bugs surfaced by review against real WML schemas.
Each one would have produced wrong structural answers from the new tools
before the dogfood window even opened.

P2 - Inheritance ordering for complexContent/extension.
  XSD says base content comes before the extension's own content
  (e.g. CT_PPr extends CT_PPrBase: pStyle and friends from base, then
  rPr/sectPr from the extension). The old code walked the chain self-
  first, so ooxml_children("w:pPr") would have surfaced the extension's
  rPr/sectPr ahead of inherited pStyle. complexContent/restriction is
  now also handled correctly: derived REPLACES base content, so the
  base is no longer included for restriction relations.

P2 - Compositor flattening across nested particles.
  order_index is local to each compositor. The old query joined
  child_edges + group_edges across ALL compositors of a type and sorted
  by order_index alone, so a nested choice's children (which restart at
  order 0) sorted before later siblings of the outer sequence. WML's
  CT_Object would have reported the inner choice's first child before
  drawing. Fixed with a recursive walkCompositor that does DFS through
  parent_compositor_id, emitting children in true document order. Each
  ChildEdge now carries a compositorPath like
  ["sequence(1..1)", "choice(0..unbounded)"] for downstream rendering.

P2 - Recursive attributeGroup refs.
  The previous code only fetched direct xsd_attr_edges from a referenced
  group, not the group's own xsd_group_edges with ref_kind='attributeGroup'.
  VML's AG_AllCoreAttributes -> AG_CoreAttributes -> AG_Id/AG_Style chain
  would have lost most attributes. Now collectAttrsFromAttributeGroup
  recurses with a visited-set guard against cycles, so nested
  attributeGroup chains unfold completely.

Tests:
  - 3 new query-layer tests cover each fix path against fixtures:
    CT_DerivedExtended verifies extension order, CT_NestedOrder verifies
    nested compositor flatten, CT_NestedAttrUser verifies nested
    attributeGroup chain.
  - Fixture main.xsd grows: CT_BaseWithChildren / CT_DerivedExtended /
    CT_NestedOrder / AG_Inner / AG_Outer / CT_NestedAttrUser. Existing
    ingest counts updated to match.

Test infra: bun's default 5s timeout was tight for the WML smoke ingest
on a busy DB; bumped that test to 30s. test runner now sequences the
three test directories so the WML smoke and the fixture-ingest tests do
not race for the same connection pool.

39 / 0 across db / ingest / mcp-server.

Author: caiopizzol

apps/mcp-server/src/mcp.ts

@@ -7,12 +7,7 @@
 import { createDb } from "./db";
 import { embedQuery } from "./embeddings";
 import type { Env } from "./index";
-import {
-	OOXML_TOOL_DEFS,
-	callOoxmlTool,
-	isOoxmlTool,
-	ooxmlToolsEnabled,
-} from "./ooxml-tools";
+import { callOoxmlTool, isOoxmlTool, OOXML_TOOL_DEFS, ooxmlToolsEnabled } from "./ooxml-tools";
 
 // JSON-RPC types
 interface JsonRpcRequest {