* switch off parachains relay when we don't need to relay parachains (temp solution)
* parachains relay now only works with single parachain
* fix usages of parachains relay
* revert hacky fix
* fixes
* fixed Westmint parachain ID
* fixed metrics
* fixed compilation
* fmt
* clippy
* call -> typed_state_call
* `best_finalized_peer_at_best_self` in messages relay is now Option<> - before it was an error, which effectively blocked the lane
* unnecessary mut
* clone on return
* Small changes
* Define generic bridge pallets call structs
* polkadot-core SignedExtension simplifications
- we don't seem to need to pass the Call as a generic param
- we can use codec(skip) instead of implementing Encode and Decode
* Split BridgeHubRococo and BridgeHubWococo calls
* code review fixes
* batch transactions in message relay: API prototype
* get rid of Box<dyn BatchTransaction> and actually submit it
* test batch transactions
* message_lane_loop_works_with_batch_transactions
* removed logger
* BatchConfirmationTransaction + BatchDeliveryTransaction
* more prototyping
* fmt
* continue with batch calls
* impl BatchCallBuilder for ()
* BatchDeliveryTransaction impl
* BundledBatchCallBuilder
* proper impl of BundledBatchCallBuilder + use it in RialtoParachain -> Millau
* impl prove_header in OnDemandHeadersRelay
* impl OnDemandParachainsRelay::prove_header (needs extensive tests)
* added a couple of TODOs
* return Result<Option<BatchTx>> when asking for more headers
* prove headers when reauire_* is called && return proper headers from required_header_id
* split parachains::prove_header and test select_headers_to_prove
* more traces and leave TODOs
* use finality stream in SubstrateFinalitySource::prove_block_finality
* prove parachain head at block, selected by headers relay
* const ANCIENT_BLOCK_THRESHOLD
* TODO -> proof
* clippy and spelling
* BatchCallBuilder::build_batch_call() returns Result
* read first proof from two streams
* FailedToFindFinalityProof -> FinalityProofNotFound
* changed select_headers_to_prove to version from PR review
* SignedBlock: get justification by consensus engine id
* Define ConsensusLogReader
Making the check for authority changes more generic
* cod review changes
* add RialtoParachain <> Millau bridge to test deployments
* flush (still not working, but possible fix in comments)
* proper fix
* fixed on-demand parachains relay case: if better relay header is delivered, then we must select para header that may be proved using this relay header
* dashboards
* fmt
* removing debugging code
* more cleanup
Svyatoslav Nikolsky