feat(e2e): track per-test setup/hook timings

[spalladino]

What

Adds per-test timing capture to the e2e suite (A-1178, Phase 1), distinguishing function-level time inside our setup()/teardown() from hook-level time across jest's before/after hooks, and uploads one JSONL file per test to S3 with a ci.sh command to pull a run's timings back.

This is the PR-independent subset that does not depend on the e2e consolidation reorg (#24201). The reorg-gated pieces (wait:*/compute body split, multi-node/prover-node start attribution) are deliberately deferred — those files don't exist on this base.

Fixes A-1180

Fixes A-1181

How

• yarn-project/end-to-end/src/shared/timing_env.mjs (new) — a TimingEnvironment subclass of foundation's CustomEnvironment. Calls await super.handleTestEvent() first (preserves the base env's unhandled-rejection patching), then times jest-circus events (hook_start/hook_success/hook_failure by hook type, test_fn_* for the body, test_start/test_done for total). Installs a collector on this.global and flushes JSONL on env teardown. Entirely gated on E2E_TIMING_FILE; a pure delegate otherwise.
• package.json — jest.testEnvironment → ./shared/timing_env.mjs.
• fixtures/setup.ts — wraps the exported setup() and the inner teardown closure (both ctx.teardown() and the exported teardown(context) funnel through it) in try/finally, pushing their durations to globalThis.__e2eTimings, tagged with the running test (or null during beforeAll/afterAll).
• ci3/exec_test — exports E2E_TIMING_FILE and, after the test, uploads the gzipped file via cache_s3_transfer_to.
• ci3/run_test_cmd — passes the attempt's log id to exec_test as E2E_LOG_ID (tracks rotate_log on retries).
• ci.sh — new e2e-timings <ci_log_id> <folder> command: aws s3 cp --recursive the job's prefix and gunzip each file to <log_id>.jsonl.
• tsconfig.json / eslint.config.js — exclude/ignore the env .mjs (it imports foundation's env across packages and jest loads it from source), matching how foundation already ignores its own src/jest/*.mjs.

JSONL schema (one line per test)

{ "suite":"e2e_fees", "name":"pays fee via private payment", "status":"passed",
  "commit":"abc1234", "branch":"merge-train/spartan-v5", "runId":"177...",
  "startedAt":"2026-06-24T12:00:02.000Z",
  "setupFnMs":42000, "beforeHooksMs":47000, "bodyMs":13000,
  "teardownFnMs":2500, "afterHooksMs":3000, "totalMs":63000 }

beforeAll/afterAll (once per describe) are emitted on a single suite-scoped line with name: null.

Examples from this PR's CI run

  // type:"test" — per-test, with beforeEach setup on the test line
  { "suite":"epochs_invalidate_block.parallel", "type":"test",
    "name":"e2e_epochs/epochs_invalidate_block proposer invalidates previous checkpoint…",
    "status":"passed", "setupFnMs":14330, "beforeHooksMs":19357, "bodyMs":179667,
    "teardownFnMs":732, "afterHooksMs":765, "totalMs":199797,
    "startedAt":"2026-06-25T12:58:34.643Z",
    "commit":"1925654a900…", "branch":"spl/a-1178-track-running-times", "runId":"28171484400" }

  // type:"suite" — the former name:null line (beforeAll/afterAll for the whole file)
  { "suite":"e2e_amm", "type":"suite", "name":null, "status":"passed",
    "setupFnMs":32591, "beforeHooksMs":61200, "teardownFnMs":102, "afterHooksMs":103, "totalMs":61303,
    "commit":"1925654a900…", "branch":"spl/a-1178-track-running-times", "runId":"28171484400" }

Storage & retrieval

• S3 object: s3://aztec-ci-artifacts/logs/e2e-timings/<CI_LOG_ID>/<LOG_ID>.log.gz (gzipped JSONL).
  • CI_LOG_ID = the job's top-level log id (the decimal id in a job's ci.aztec-labs.com/<id> URL) — per-job, so it's collision-free under grind.
  • LOG_ID = the test's individual log id, the same id as the test's log at ci.aztec-labs.com/<log_id>, so a test log maps straight to its timing file.
• Download: ./ci.sh e2e-timings <ci_log_id> <folder> → <folder>/<LOG_ID>.jsonl per test (the suite/name fields inside identify the test).

Notes

• References A-1178 / A-1179 / A-1180 / A-1181 (Phase-1 subset; no auto-closing keywords).
• No ci-no-squash label — single commit on merge.