Cardano Updates

Trace TraceTxInboundCanRequestMoreTxs and
TraceTxInboundCannotRequestMoreTxs just as V1 does.

Wrap `Channel m a` recv values in a new `Reception a = MkReception
!(IntMap Time) !a`, recording per-chunk arrival times.  In the mux
demuxer the chunk's arrival time is paired with its starting byte
offset; codec/driver layers either strip the time map (the codec sees
only bytes) or propagate it through `wrapMiniProtocolTrailing` at the
mini-protocol callback boundary.  Tests/demos/benches use `IntMap.empty`
when synthesising trailing.

This is the network half of the November Leios demo's arrival-time
plumbing; consumers (e.g. Praos block-arrival tracing on the consensus
side) will be wired up separately.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Upstream cleanup, not Leios-specific: eight unused-import warnings that
upstream's own ghc-options promote to errors via 'nix/ouroboros-network.nix'
('-Werror' on forAllProjectPackages). They've been present at the
'main-peras-5202-merged' SHA that cardano-node and ouroboros-consensus
master both consume; surface when downstream haskell.nix builds also
inherit `-Werror`.

Affected files (one unused qualified import each):
- framework/lib/Ouroboros/Network/Protocol/Handshake/Codec.hs (BL)
- framework/tests-lib/.../ConnectionManager/Experiments.hs (LBS)
- framework/io-tests/.../Driver.hs (List)
- framework/io-tests/.../Socket.hs (IntMap)
- tests/lib/.../TxSubmission/AppV1.hs (BSL)
- tests/lib/.../TxSubmission/AppV2.hs (BSL)
- protocols/tests-lib/.../KeepAlive/Test.hs (BL)
- protocols/tests-lib/.../PeerSharing/Test.hs (BL)

Verified with 'cabal clean && cabal build all --ghc-options=-Werror' →
exit 0.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

It doesn't run any tests, this is similar to `cabal build all`.

Upstream cleanup, not Leios-specific: eight unused-import warnings that
upstream's own ghc-options promote to errors via 'nix/ouroboros-network.nix'
('-Werror' on forAllProjectPackages). They've been present at the
'main-peras-5202-merged' SHA that cardano-node and ouroboros-consensus
master both consume; surface when downstream haskell.nix builds also
inherit `-Werror`.

Affected files (one unused qualified import each):
- framework/lib/Ouroboros/Network/Protocol/Handshake/Codec.hs (BL)
- framework/tests-lib/.../ConnectionManager/Experiments.hs (LBS)
- framework/io-tests/.../Driver.hs (List)
- framework/io-tests/.../Socket.hs (IntMap)
- tests/lib/.../TxSubmission/AppV1.hs (BSL)
- tests/lib/.../TxSubmission/AppV2.hs (BSL)
- protocols/tests-lib/.../KeepAlive/Test.hs (BL)
- protocols/tests-lib/.../PeerSharing/Test.hs (BL)

Verified with 'cabal clean && cabal build all --ghc-options=-Werror' →
exit 0.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Replace the positional definition of `Reception` with named fields
`receivalTimes` and `received`:

    data Reception a = MkReception
      { receivalTimes :: !(IntMap Time)
      , received      :: !a
      }

Positional pattern matches continue to work; the fields just make
record-style access available where it reads better.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Wrap `Channel m a` recv values in a new `Reception a = MkReception
!(IntMap Time) !a`, recording per-chunk arrival times.  In the mux
demuxer the chunk's arrival time is paired with its starting byte
offset; codec/driver layers either strip the time map (the codec sees
only bytes) or propagate it through `wrapMiniProtocolTrailing` at the
mini-protocol callback boundary.  Tests/demos/benches use `IntMap.empty`
when synthesising trailing.

This is the network half of the November Leios demo's arrival-time
plumbing; consumers (e.g. Praos block-arrival tracing on the consensus
side) will be wired up separately.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

The Data.Strict.Pair-based IngressQueueVal was simplified out long ago,
but the cabal entry was never removed. Surfaces as `[GHC-42258]
-Werror=unused-packages` in haskell.nix-based consumers (e.g. cardano-node
nix-direnv).

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Decouple bracketFetchClient and bracketKeepAlive

Replace the `dataSize :: bytes -> Word` field of `ProtocolSizeLimits`
with a `BearerBytes` class:

    class BearerBytes bytes where
        bearerBytesSize :: bytes -> Word

Default instances cover `BS.ByteString`, `BL.ByteString`, `[Char]` and
`AnyMessage msg` (for tests).  Driver/Limits gains a `BearerBytes bytes`
constraint on the public entry points (`runPeerWithLimits` and friends).
The seven `byteLimits*` codec helpers no longer take a
`(bytes -> Word)` argument — call sites drop the `(fromIntegral .
LBS.length)` boilerplate.  Two test predicates that previously used
`dataSize` now call `bearerBytesSize` directly.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Replace the positional definition of `Reception` with named fields
`receivalTimes` and `received`:

    data Reception a = MkReception
      { receivalTimes :: !(IntMap Time)
      , received      :: !a
      }

Positional pattern matches continue to work; the fields just make
record-style access available where it reads better.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Wrap `Channel m a` recv values in a new `Reception a = MkReception
!(IntMap Time) !a`, recording per-chunk arrival times.  In the mux
demuxer the chunk's arrival time is paired with its starting byte
offset; codec/driver layers either strip the time map (the codec sees
only bytes) or propagate it through `wrapMiniProtocolTrailing` at the
mini-protocol callback boundary.  Tests/demos/benches use `IntMap.empty`
when synthesising trailing.

This is the network half of the November Leios demo's arrival-time
plumbing; consumers (e.g. Praos block-arrival tracing on the consensus
side) will be wired up separately.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Exports of `BlockFetch.ClientRegistry` are preserved, so no consequences
for downstream libraries.

Replace the `dataSize :: bytes -> Word` field of `ProtocolSizeLimits`
with a `BearerBytes` class:

    class BearerBytes bytes where
        bearerBytesSize :: bytes -> Word

Default instances cover `BS.ByteString`, `BL.ByteString`, `[Char]` and
`AnyMessage msg` (for tests).  Driver/Limits gains a `BearerBytes bytes`
constraint on the public entry points (`runPeerWithLimits` and friends).
The seven `byteLimits*` codec helpers no longer take a
`(bytes -> Word)` argument — call sites drop the `(fromIntegral .
LBS.length)` boilerplate.  Two test predicates that previously used
`dataSize` now call `bearerBytesSize` directly.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Set @TCP_NOTSENT_LOWAT = 32 000@ (~1.5 slow-start congestion window) and
@TCP_NODELAY = 1@ on each socket bearer at construction.  This caps the
kernel-side unsent buffer so that egress backpressure surfaces to the
mux scheduler instead of being absorbed silently — important for the
Leios demo where we want timely round-tripping of EB announcements and
fetches.

`TCP_NOTSENT_LOWAT` is not yet exposed by the `network` package, so we
use the numeric constants from Linux's `<netinet/tcp.h>`
(`IPPROTO_TCP` = 6, `TCP_NOTSENT_LOWAT` = 25) directly.

Co-Authored-By: Claude Opus 4.7 <[email protected]>