fix: increase curl timeout to 600s for long-running AI tasks

CURLOPT_TIMEOUT was 180s. Generating a consultation summary requires
up to 10 AI iterations at ~20s each, regularly hitting the limit and
causing a "שגיאה בתקשורת" error in the UI before Shira could respond.

Raised to 600s. The shira-hermes agent runner now also enforces a 570s
total budget so it returns a clean Hebrew message if the limit is hit,
rather than the PHP connection being cut mid-response.

Refs Task Master #2

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

manifest.json

@@ -3,11 +3,11 @@
     "module": "SmartAssistant",
     "description": "Unified AI Assistant for Legal CRM — floating chat with case memory, office alerts, and AI Gateway integration",
     "author": "klear",
-    "version": "2.8.0",
+    "version": "2.8.1",
     "acceptableVersions": [
         ">=8.0.0"
     ],
-    "releaseDate": "2026-04-19",
+    "releaseDate": "2026-05-06",
     "php": [
         ">=8.1"
     ]