fix(librarian): expose page_id in wiki search results

search_wiki printed ordinally numbered results with no page ID while
get_wiki_page demands 'the page ID from search results' - the model
passed the list position (page 1) and 404'd. Results now carry
page_id and drop the ordinals.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/agents/librarian/tools.py

@@ -246,11 +246,14 @@ async def search_wiki(
 
             output_parts = [f"## Wiki Search: {query}\n"]
 
-            for i, page in enumerate(results, 1):
-                output_parts.append(f"{i}. **{page.title}**")
-                output_parts.append(f"   Path: {page.path}")
+            # No ordinal numbering: small models pass the list position to
+            # get_wiki_page instead of the page ID unless the ID is the only
+            # number in sight.
+            for page in results:
+                output_parts.append(f"- **{page.title}** (page_id: {page.id})")
+                output_parts.append(f"  Path: {page.path}")
                 if page.description:
-                    output_parts.append(f"   {page.description}")
+                    output_parts.append(f"  {page.description}")
                 output_parts.append("")
 
             return "\n".join(output_parts)