Replace NODEJS_22_X with NODEJS_24_X across all nine Lambda NodejsFunction
definitions in lib/constructs/ (bedrock-agent, slack-handler, notion-sync,
po-sync, workorder-sync). Also add dependabot ignore for @types/node >=26
to prevent premature major bumps while we stay on the nodejs24.x runtime.
Both package.json files already carry @types/node ^24 — no pin change needed.
Refs #72
Adds a scheduled Lambda that pulls all pages from the Office Operations
Notion teamspace, converts them to markdown, uploads to the KB S3 bucket
under a notion/ prefix, and triggers a Bedrock ingestion job. Runs daily
at 02:00 UTC via EventBridge. Notion API key stored in Secrets Manager at
seahaven/notion/api-key (placeholder — fill in post-deploy).