feat: limit the number of messages in prepare proposal

[rach-id]

This PR limits the number of transactions in prepare proposal.

[coderabbitai[bot]]

📝 Walkthrough

📝 Walkthrough

## Walkthrough The changes in this pull request enhance the testing framework and transaction filtering logic within the application. New test functions are introduced to validate transaction limits for different transaction types, while existing functions are modified to enforce caps on specific transactions. Additionally, new constants are added to define these limits, improving the overall configuration of transaction handling. ## Changes | File Path | Change Summary | |------------------------------------|----------------------------------------------------------------------------------------------------| | app/test/prepare_proposal_test.go | Added new test functions `TestPrepareProposalCappingNumberOfTransactions` and `TestPrepareProposalCappingNumberOfMessages` for transaction limit tests. | | app/validate_txs.go | Updated `filterStdTxs` and `filterBlobTxs` functions to enforce transaction limits and added `countOccurrence` helper function. | | pkg/appconsts/global_consts.go | Added constants `NonPFBTransactionCap` and `PFBTransactionCap` for transaction limits. | | pkg/appconsts/v3/app_consts.go | Introduced constants `MsgSendTransactionCap` (3200), `SdkMsgTransactionCap` (200), and `PFBTransactionCap` (600) for transaction limits. | | Makefile | Modified `test-race` target to include a timeout parameter for test execution. | ## Possibly related PRs - **#3909**: This PR introduces new test cases in `app/test/prepare_proposal_test.go` that validate the behavior of the `PrepareProposal` function when handling oversized transactions, which directly relates to the enhancements made in the main PR regarding transaction capping. - **#3967**: This PR modifies `app/test/prepare_proposal_test.go` to update comments and variable names reflecting the shift from "MaxTxBytes" to "MaxTxSize," aligning with the changes in the main PR that also focus on capping transaction sizes. ## Suggested labels `testing`, `WS: Big Blonks 🔭`, `optimization`, `WS: Maintenance 🔧` ## Suggested reviewers - evan-forbes - ninabarbakadze - rootulp - cmwaters

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[rach-id]

One extra test case for transactions with multiple messages

c5071a3a3aaa8eea231492f1398123492b195508

[rach-id]

https://github.com/celestiaorg/celestia-app/issues/3972