Add logger filter to drop repetitive 'Cannot find module' errors
from net-snmp library. These errors occur when snmptranslate can't
find vendor-specific MIB modules but don't affect functionality
since the system falls back to numeric OIDs.
The errors were flooding production logs (hundreds of identical
messages) during polling of Morningstar devices that reference
TRISTAR MIB modules.
Changes:
- Add drop_snmp_mib_errors/2 filter to LoggerFilters module
- Register filter in production logger configuration
- Filter matches exact error format from snmptranslate stderr
The root cause (missing NIF binary) will be addressed separately
by compiling the towerops_nif.so during Docker build.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
The plug was incorrectly placed in the endpoint, causing it to run on
all requests including APIs. Moved to :browser pipeline where it belongs,
and removed redundant fetch_session call since the pipeline handles it.
When Kubernetes performs rolling deployments, the old pod gracefully shuts down
and Oban's internal processes receive EXIT :shutdown signals. These are logged
as "unexpected" even though they're normal during shutdown.
Added custom logger filter to drop these messages in production:
- Oban.Queue.Watchman/Producer receiving EXIT :shutdown
- Oban plugin processes receiving EXIT :shutdown
- Reduces log noise during deployments without hiding real errors
The filter is production-only to preserve full debugging in development.
