- poller/docker-entrypoint.sh: convert from CRLF+BOM to LF (UTF-8 no BOM)
Windows saved the file with a UTF-8 BOM which made the Linux kernel
reject the shebang with 'exec format error', crashing the poller.
- infrastructure/openbao/init.sh: same CRLF -> LF fix
- poller/Dockerfile: add sed to strip CRLF and BOM at image build time
as a defensive measure for future Windows edits
- docker-compose.override.yml: add 'restart: on-failure' to api and poller
so they recover from the postgres startup race (TimescaleDB restarts
postgres after initdb, briefly causing connection refused on first boot)
- .gitattributes: enforce LF for all text/script/code files so git
normalises line endings on checkout and prevents this class of bug
