fix: worker naming, monitor commands, and findings CLI improvements

This PR addresses multiple issues and improvements across the CLI and backend:

**Worker Naming Fixes:**
- Fix worker container naming mismatch between CLI and docker-compose
- Update worker_manager.py to use docker compose commands with service names
- Remove worker_container field from workflows API, keep only worker_service
- Backend now correctly uses service names (worker-python, worker-secrets, etc.)

**Backend API Fixes:**
- Fix workflow name extraction from run_id in runs.py (was showing "unknown")
- Update monitor command suggestions from 'monitor stats' to 'monitor live'

**Monitor Command Consolidation:**
- Merge 'monitor stats' and 'monitor live' into single 'monitor live' command
- Add --once and --style flags for flexibility
- Remove all references to deprecated 'monitor stats' command

**Findings CLI Structure Improvements (Closes #18):**
- Move 'show' command from 'findings' (plural) to 'finding' (singular)
- Keep 'export' command in 'findings' (plural) as it exports all findings
- Remove broken 'analyze' command (imported non-existent function)
- Update all command suggestions to use correct paths
- Fix smart routing logic in main.py to handle new command structure
- Add export suggestions after viewing findings with unique timestamps
- Change default export format to SARIF (industry standard)

**Docker Compose:**
- Remove obsolete version field to fix deprecation warning

All commands tested and working:
- ff finding show <run-id> --rule <rule-id> ✓
- ff findings export <run-id> ✓
- ff finding <run-id> (direct viewing) ✓
- ff monitor live <run-id> ✓

docker-compose.yml

@@ -9,8 +9,6 @@
 #   Development: docker-compose -f docker-compose.temporal.yaml up
 #   Production:  docker-compose -f docker-compose.temporal.yaml -f docker-compose.temporal.prod.yaml up
 
-version: '3.8'
-
 services:
   # ============================================================================
   # Temporal Server - Workflow Orchestration