Cardano Updates

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

Various testing & mux improvements

New external exporter module that fetches data from HTTP APIs, produces
parquet files, and uploads to S3. Separate from the existing PG-based
pipeline since these exporters produce data rather than discovering
pre-existing files.

- asset_data: Fetches verified token metrics from Minswap API with
  search_after pagination (100/page, 1s delay, 5s on rate limit)
- contract_registry: Incremental export from 3 GitHub sources
  (StricaHQ, CRFA v2, CRFA v1) with priority-based dedup and
  commit SHA tracking for change detection
- CLI: --external and --external-all options, PG credentials optional
- SQLite: 3 new tables for run tracking, commit state, hash tracking
- README: Updated with external exporter docs, new CLI options, schemas

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

Bump ouroboros-network to 1.1

# Conflicts:
#	node.go

Parametrise `Ouroboros.Network.Socket` API with monad `m`.  This patch
allows us to have a cleaner integration of ouroboros-network in
`dmq-node`, where we need to connect to the node, but we don't want to
be forced to use `IO` monad too early or pass callbacks around.

Signed-off-by: Chris Gianelloni <[email protected]>

Haddock improvements

John Lotoski found that it doesn't appear under any condition
(GenesisMode, PraosMode).  Now connection manager & peer selection
exposes a more detailed metrics including
`cardano_node_metrics_peerSelection_ActivePeers_int`

- fix blockfrost response types to match alonzo genesis ones