A dual widevine/playready cdm entry now loads the device of the client's DRM system, for old clients too since they already send cdm_type. A new client hands a capped track to its own device for the track's DRM system, and raises the refusal only after its local vaults miss.
Drop null keys from every licence, server and export source, not only Widevine. dl now finds remote sessions and imports through ServerKeySource instead of private fields.
Judge a vault KID only on a file whose KID map holds it, tell remote vaults of a bad pair only once another key replaces it, and let the server CDM unflag a pair it returns; the server never flags a CDM-licensed pair. Log FFmpeg stderr on a failed check and name the missing CDM when none is set.
The server CDM stub names only the manifest's KIDs; sibling keys stay content keys. API and HTTP vaults retry a 429, and a vault that is down or still rate limited costs one timeout per run.
The licence response lists KIDs a server vault supplied, the client proves them with the decode check, and a bad pair goes to the new session keys/bad route so the server flags its own row. Client vault keys go first over --remote, and the dashboard health warns when no SQLite vault can store flags.
Verify a vault-sourced key with an FFmpeg decode after decryption. On failure flag the KID:KEY locally with its source, restore the ciphertext, and retry through the remaining vaults and then the CDM.
Batch and per-track remote licences read the vaults but never wrote back, so a --remote or import run kept nothing. Vault hits now replicate to the other vaults, and the server branch resolves keys under drm_lock like the local path.
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