smite: extend accept_channel oracle with sanity and key reuse checks

[NishantBansal2003]

ref: #209 (comment)

Some more oracles added in this PR:

open_channel

• chain_hash != regtest
• channel_reserve_satoshis >= funding_satoshis
• dust_limit_satoshis > 10_000 sat
• to_self_delay > 2016
• feerate_per_kw == 0 for non 0FC channels

accept_channel

• dust_limit_satoshis > 10_000 sat
• htlc_minimum_msat > max_htlc_value_in_flight_msat
• htlc_minimum_msat > open_channel.funding_satoshis
• to_self_delay == 0
• max_accepted_htlcs == 0
• pubkey match any pubkeys from open_channel and accept_channel
• per_commitment_point should not be reused

Notes

• CLN defaults to_self_delay to 6 in accept_channel on regtest and 144 on mainnet, so I think we should only check that to_self_delay != 0
• CLN defaults the feerate_per_kw floor to 1 on regtest and 253 on mainnet when accepting the open_channel message, so I think we should only check that feerate_per_kw != 0