fix(appraiser-facts): route extraction through analyst wakeup (was silent 0)

The "חלץ עובדות שמאיות" UI button hit POST /api/cases/{n}/extract-appraiser-facts
which called appraiser_facts_extractor inline — that shells out to the local
`claude` CLI, which is absent in the Coolify container, so every doc errored,
the per-doc try/except swallowed it, and the response was "completed, 0 facts".

Refactored the endpoint to wake the legal-analyst of the correct company via
Paperclip (same pattern as wake_curator_for_final), and surface
extraction_failed instead of "completed" when every doc errored.

web-ui/src/lib/api/documents.ts

@@ -160,6 +160,23 @@ export type ExtractAppraiserFactsResponse =
       appraisal_count: number;
       missing: { document_id: string; title: string; current_side: string }[];
       message: string;
+    }
+  | {
+      // The chair clicked the button; backend created a child Paperclip
+      // issue assigned to the legal-analyst, which will run the MCP tool
+      // on the host (where the Claude CLI lives) and post results back.
+      status: "queued";
+      sub_issue_id: string;
+      analyst_id: string;
+      main_issue_id: string;
+    }
+  | {
+      // No analyst route was available (no API key / no analyst configured /
+      // no Paperclip issue linked to the case). Non-fatal — the chair can
+      // still trigger extraction manually from Claude Code.
+      status: "skipped";
+      reason: "no_api_key" | "no_analyst" | "no_issue" | string;
+      company_id?: string;
     };
 
 async function extractAppraiserFacts(