Feat/block replay time

[rob-stacks]

Description

This simple patch adds a new information to every transaction in the blockreplay/simulate api: execution_time_millis

It is the amount of wall-clock milliseconds required for executing the transaction. It is a simple fallback for those platform
without hardware profiler support.

Note: the patch fixes a bunch of error in the openapi schema

Applicable issues

• fixes #

Additional info (benefits, drawbacks, caveats)

Checklist

• Test coverage for new or modified code paths
• For new Clarity features or consensus changes, add property tests (see docs/property-testing.md)
• Changelog fragment(s) or "no changelog" label added (see changelog.d/README.md)
• Required documentation changes (e.g., rpc/openapi.yaml for RPC endpoints, event-dispatcher.md for new events)
• New clarity functions have corresponding PR in clarity-benchmarking repo

[coveralls]

Coverage Report for CI Build 26511304685

Coverage decreased (-3.4%) to 82.325%

Details

• Coverage decreased (-3.4%) from the base build.
• Patch coverage: 33 of 33 lines across 1 file are fully covered (100%).
• 13725 coverage regressions across 183 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

13725 previously-covered lines in 183 files lost coverage.

Top 10 Files by Coverage Loss	Lines Losing Coverage	Coverage
stackslib/src/net/chat.rs	653	83.57%
stackslib/src/chainstate/stacks/transaction.rs	550	87.08%
stackslib/src/config/mod.rs	518	61.69%
stackslib/src/chainstate/burn/db/sortdb.rs	511	83.28%
stackslib/src/chainstate/stacks/db/transactions.rs	486	93.81%
clarity/src/vm/ast/parser/v2/lexer/mod.rs	468	58.39%
stackslib/src/net/mod.rs	410	74.14%
stackslib/src/chainstate/stacks/db/blocks.rs	296	86.39%
stackslib/src/chainstate/burn/operations/leader_key_register.rs	265	45.05%
stackslib/src/chainstate/stacks/index/storage.rs	261	80.6%

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Coverage Stats

Relevant Lines:	220673
Covered Lines:	181668
Line Coverage:	82.32%
Coverage Strength:	18368702.63 hits per line

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💛 - Coveralls

[CLAassistant]

All committers have signed the CLA.

[Copilot]

Pull request overview

Adds wall-clock execution timing metrics to transactions returned by the Nakamoto blockreplay / blocksimulate RPC responses, intended as a fallback when hardware profiling isn’t available. The PR also attempts to update the OpenAPI schema for the replay transaction object.

Changes:

• Add per-transaction wall-clock timing collection (execution_stats) during block (re)mining.
• Refactor transaction RPC response to include an optional nested profiler object and attach timing data.
• Update RPC schema + add changelog fragment (schema update currently has blocking correctness issues).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 8 comments.

File	Description
stackslib/src/net/api/blockreplay.rs	Adds timing tracker and exposes it in replay/simulate transaction responses; refactors profiler fields into a nested object.
stackslib/src/net/api/tests/blockreplay.rs	Adds a basic assertion referencing the new timing field.
docs/rpc/components/schemas/block-replay-transaction.schema.yaml	Attempts to document execution_stats (currently invalid schema + mismatched response shape).
changelog.d/block_replay_execution_stats.added	Changelog entry for the new execution_stats response data.

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[federico-stacks]

Heads-up: a bunch of jobs failed including OpenApi validation