add README [skip ci]

add env vars

update roadmap with upcoming decisions to make

testing: add Postman test suite (first draft)

fix(infra): decouple cross-stack ALB reference via SSM to prevent CFN export lock

feat(infra): implement HTTP API private integration via ALB + VPC Link

fix(ci): use SHA-tagged image for deterministic ECS deployments

debug(ci): attempt to populate ECR image URI

fix(ci): fetch ECR repo name via AWS CLI instead of relying on output parsing

Fix deployment issues:

fix(ci): add explicit OIDC permissions and prod environment to all deploy jobs

feat(ci): add GitHub Actions CI/CD workflows and explicit ECR repository

fix: add missing wind speed unit

feat(infra): deploy ingestion service to ECS with API Gateway integration

feat(ingestion): add external data poller (NOAA + OpenWeatherMap)