Convert all actors from queues/workflows to direct actions, lazy task creation

Major refactor replacing all queue-based workflow communication with direct
RivetKit action calls across all actors. This works around a RivetKit bug
where c.queue.iter() deadlocks for actors created from another actor's context.

Key changes:
- All actors (organization, task, user, audit-log, github-data) converted
  from run: workflow(...) to actions-only (no run handler, no queues)
- PR sync creates virtual task entries in org local DB instead of spawning
  task actors — prevents OOM from 200+ actors created simultaneously
- Task actors created lazily on first user interaction via getOrCreate,
  self-initialize from org's getTaskIndexEntry data
- Removed requireRepoExists cross-actor call (caused 500s), replaced with
  local resolveTaskRepoId from org's taskIndex table
- Fixed getOrganizationContext to thread overrides through all sync phases
- Fixed sandbox repo path (/home/user/repo for E2B compatibility)
- Fixed buildSessionDetail to skip transcript fetch for pending sessions
- Added process crash protection (uncaughtException/unhandledRejection)
- Fixed React infinite render loop in mock-layout useEffect dependencies
- Added sandbox listProcesses error handling for expired E2B sandboxes
- Set E2B sandbox timeout to 1 hour (was 5 min default)
- Updated CLAUDE.md with lazy task creation rules, no-silent-catch policy,
  React hook dependency safety rules

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

foundry/packages/frontend/src/components/mock-layout.tsx

@@ -346,16 +346,17 @@ const TranscriptPanel = memo(function TranscriptPanel({
     (activeAgentSession.status === "pending_provision" || activeAgentSession.status === "pending_session_create" || activeAgentSession.status === "error") &&
     activeMessages.length === 0;
   const serverDraft = promptSession?.draft.text ?? "";
-  const serverAttachments = promptSession?.draft.attachments ?? [];
+  const serverAttachments = promptSession?.draft.attachments;
+  const serverAttachmentsJson = JSON.stringify(serverAttachments ?? []);
 
   // Sync server → local only when user hasn't typed recently (3s cooldown)
   const DRAFT_SYNC_COOLDOWN_MS = 3_000;
   useEffect(() => {
     if (Date.now() - lastEditTimeRef.current > DRAFT_SYNC_COOLDOWN_MS) {
       setLocalDraft(serverDraft);
-      setLocalAttachments(serverAttachments);
+      setLocalAttachments(serverAttachments ?? []);
     }
-  }, [serverDraft, serverAttachments]);
+  }, [serverDraft, serverAttachmentsJson]);
 
   // Reset local draft immediately on session/task switch
   useEffect(() => {