Shackleton AI has raised $5 million in seed funding led by Battery Ventures as it emerges from stealth with an agentic platform for development and construction management. The New York company is targeting the administrative work that sits between a construction project’s plans, finances, field reports, and communications. Brick & Mortar Ventures, Trust Ventures, Correlation Ventures, Motivate Partners, Thayer Investment Partners, Act One Ventures, Brainstorm Ventures, Silence VC, and other…