Add logging for invalid SNMP Trap ID requests

Log invalid SNMP Trap ID requests to improve troubleshooting and
runtime diagnostics.

Since EBADR results in a ResourceNotFound response, it represents
an invalid client request rather than an internal server error.
Log this condition at WARNING level while reserving ERROR level
logging for actual internal failures.

No functional behavior changes

Change-Id: I9462f86137c4522842d45bfe41b31acb7de60e1d
Signed-off-by: Shivraj Toravi <shivrajnt@ami.com>