Handle stale workspaces: 409 conflict auto-cleanup + verbose logging

When the orchestrator restarts, it loses in-memory queue state. If a
stale workspace still exists, createWorkspace now auto-deletes it and
retries instead of failing with 409. Also adds --verbose to Claude Code
invocation for better task log debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/coder.ts

@@ -50,6 +50,18 @@ export class CoderClient {
       },
     );
 
+    // Handle 409 conflict — stale workspace from a previous orchestrator instance
+    if (res.status === 409) {
+      console.log(`[coder] workspace "${name}" already exists — deleting stale workspace and retrying`);
+      const existing = await this.findWorkspaceByName(name);
+      if (existing) {
+        await this.deleteWorkspace(existing.id);
+        // Wait for deletion to propagate
+        await new Promise((resolve) => setTimeout(resolve, 5000));
+      }
+      return this.createWorkspace(task);
+    }
+
     if (!res.ok) {
       const text = await res.text();
       throw new Error(`Coder API error ${res.status}: ${text}`);