fix(voyager/state-gno): template hardcoded core realm in query_packet_by_hash

[tbruyelle]

Problem

query_packet_by_hash in the gno state module _ands two PacketSend event filters (one matched by source_channel_id, one by packet_hash). The first filter's pkg_path is templated from ibc_core_realm, but the second hardcodes gno.land/r/core/ibc/v1/core.

For any gno deployment whose IBC core realm differs from that default — e.g. the onbloc port at gno.land/r/onbloc/ibc/union/core — the second filter matches zero events, the _and yields nothing, and query_packet_by_hash returns no transaction.

Fix

Template both pkg_path filters from ibc_core_realm (bind it once as a format! captured identifier, like channel_id/packet_hash already are, and drop the now-unused positional arg). Behavioral change is one filter; diff is +4/-4.

Notes

• Found while wiring Voyager's gno modules against the onbloc gno.land/r/onbloc/ibc/union/core deployment; with ibc_core_realm set to that realm, packet-by-hash lookups resolve correctly after this change.
• I did not build voyager locally for this change — relying on CI; it's a focused string-template fix with no logic change.

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🤖 Disclosure: this PR was prepared by Claude (an AI agent) on behalf of @tbruyelle.

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