Cardano Updates

Signed-off-by: KtorZ <[email protected]>

Signed-off-by: KtorZ <[email protected]>

Working fixes from 2026-03-16 debugging session. These are workarounds
that keep the node at tip with a single peer. Proper fixes require the
phased plan (accept headers from all peers, parallel blockfetch, etc).

Chain selection:
- Incumbent advantage in EvaluateAndSwitch (no switch unless strictly ahead)
- 4 new tests for oscillation prevention

Pipeline:
- Removed ClearHeaders on connection switch (headers valid regardless of source)
- Removed blockfetch connID filter (chain validates by hash)
- Disabled chainsync client on inbound connections (server protocols only)
- Added IsInboundConnection to ConnectionManager
- Filtered PeerTipUpdateEvent to outbound connections only

Leader election:
- Inline VRF fallback when no cached schedule exists (mithril restore)
- 1 new test

Metrics:
- Block propagation delay histogram (ledger layer)
- Blockfetch blocks received counter (always-on)
- Blockfetch delay histogram (ouroboros layer)
- Badger ristretto cache hit/miss prometheus collector
- Removed CDF 32-block throttle
- PromRegistrySetter interface for plugin system

Signed-off-by: wcatz <[email protected]>

verifyEcdsaSecp256k1Signature works on a 33 byte public key not a 32 byte public key.

verifyEcdsaSecp256k1Signature works on a 33 byte public key not a 32 byte public key.

Signed-off-by: KtorZ <[email protected]>

Include ^>= 1.9. This was manually tested and worked, but ^>= 1.10
would not compile due to a new method being added to MonadEventLog.

Include ^>= 1.9. This was manually tested and worked, but ^>= 1.10
would not compile due to a new method being added to MonadEventLog.

Signed-off-by: cryptodj413 <[email protected]>

Signed-off-by: KtorZ <[email protected]>