Read coverage from your contract

Both feeds implement risk-feed-trait, so a contract can take either as a trait argument.

(use-trait risk-feed '<deployer>.risk-feed-trait.risk-feed-trait)

(define-read-only (coverage-bps-of (summary { period: uint, period-kind: (string-ascii 8),
    pool-sats: uint, obligation-sats: uint, coverage-bps: (optional uint),
    headroom-bps: (optional uint), updated-at: uint, provenance: (string-ascii 12) }))
  (get coverage-bps summary))

(define-public (read (feed <risk-feed>))
  (let ((summary (try! (contract-call? feed get-coverage-summary))))
    (ok (coverage-bps-of summary))))

Replace <deployer> with the address from Deployments.

Trait calls are not allowed from read-only functions in Clarity, so put the call in a public function.
To read pox5-reader directly from a read-only function, call it by its full contract ID instead of through the trait.
coverage-bps is none when there are no bonds. Decide what your contract should do in that case.