Team Profiles / Environments — parameter sets per environment

[jacobhuemmer]

Summary

Switch between parameter presets for different environments.

Design

• dops --env staging loads staging-specific vault
• dops env list / dops env switch production / dops env create staging
• Each environment has its own vault (separate encrypted parameter sets)
• Web UI gets environment selector in header
• Same runbooks, different saved values
• DOPS_ENV environment variable override

Impact

Eliminates "did I run this against prod or staging?" confusion. Clean separation of environment config.