Improve error handling, robustness, and resource cleanup across testnode

[joshuacolvin0]

• Fix WebSocket provider and Redis/S3 connection leaks on error paths
• Add timeouts to bridgeFunds, bridgeNativeToken, waitForSync polling loops
• Replace fragile tail|tr output parsing with validated capture helpers
• Replace sleep 45 with deterministic wait_for_chain_progress
• Add Docker healthchecks and service_healthy dependency conditions
• Fix l3node and validator sharing the same data volume
• Fix minio healthcheck using curl (not in image); use mc ready local
• Remove incorrect rollupcreator dependency on sequencer
• Fix auctioneer healthcheck checking /data which is never written
• Enable set -euo pipefail and add background PID cleanup trap
• Replace sed-based JSON rewriting with atomic jq + mv
• Fix missing shift for --dev-contracts flag
• Fix unanchored regexes and order-dependent flag validation
• Add argument validation for --batchposters, --redundantsequencers, --l3-fee-token-decimals
• Replace process.exit(1) with throw in stress.ts
• Fix yargs boolean type for l3 flag
• Deduplicate readJsonFile pattern into shared helper
• Fix echo saying "L2" during L1 Reference DA deployment

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