Backends read snake_case filter params (type_id, vendor_id, location_id,
businessunit_id, status_id, os_id) while the frontend sends the concatenated
form (typeid, vendorid, ...), so the network/notifications/printers list
filters silently did nothing. Backends now read the concatenated name with a
snake_case fallback (no breakage), matching the locked naming convention.
Verified: network type filter now narrows results (45 -> 25 for Access Points).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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