Do not re-export ORES_* env vars in Bash tool calls

The user pre-exports ORES_TEST_DB_* and other ORES_* environment variables in their shell session before starting Claude Code. Do not prepend these to Bash commands the tool runs.

Why: Re-exporting variables the user has already set is redundant and adds noise to every command. The user explicitly fed this back in early sessions.

How to apply: Run test binaries and other commands directly, e.g. ./publish/bin/ores.nats.tests, never with a ORES_TEST_DB_USER=x prefix. Same rule for any other ORES_* variable.