Add telegraf-entrypoint.sh to render telegraf.conf from the template
(replacing @@HOST_TAG_BLOCK@@ and @@ZFS_BLOCK@@ markers via awk) and
exec telegraf. Add test-telegraf-entrypoint.sh with 8 offline tests
(10 assertions) covering marker substitution and required-env validation.
Fix run() stderr redirect from >/dev/null 2>&1 to >/dev/null so that
entrypoint error output reaches the T6-T8 assertion captures.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
f898d65983