After PR #22 and the AUTO-mode extension started caching attested
generateKey responses in teeResponses, KEY_ID getKeyEntry lookups for
attested keys returned from memory in ~1ms while non-attested keys
forwarded to real keystore2 took ~1.5ms.
TimingSideChannelProbe measured the 1.55x ratio against its 1.1x
threshold and flagged the asymmetry.
Forward non-attested generateKey to real keystore2 with post-hook
enabled (Continue instead of ContinueAndSkipPost), and extend the
GENERATE_KEY post-hook to cache no-chain responses into teeResponses.
The KEY_ID lookup added in the previous commit now resolves both
paths from memory at matched latency. Cert-chain patching is skipped
for the no-chain branch because there is no attestation extension to
rewrite.