feat: add libp2p identify table schema

[raulk]

This PR adds the ClickHouse table schemas for the new libp2p_identify event
type, which captures libp2p Identify handshake results (peer agent version,
protocols, listen addresses, transport negotiation, etc.).

Table schemas

libp2p_identify_local.sql defines the ReplicatedReplacingMergeTree table with
all identify-specific columns (success, error, protocol_version, protocols,
listen_addrs, observed_addr, transport, security, muxer, direction,
remote_multiaddr) alongside the standard remote peer geo/agent columns and
meta_client/meta_network columns. The table follows the same pattern as
libp2p_connected_local.sql.

libp2p_identify.sql defines the Distributed table sharded by
cityHash64(event_date_time, meta_network_name, meta_client_name, remote_peer_id_unique_key, direction).

Configuration

The table entry is added to config.yaml with daily partitioning on
event_date_time, enabled for mainnet, hoodi, and sepolia starting
2026-02-20.

Companion PR: ethpandaops/xatu#763