feat: produce observed accounts and flow-adjusted investment results - #161

Regenerate lock metadata offline after the direct immutable source dependency. Preserve all other package versions and source identities; the public locked Zipline builder now succeeds.

…rics

… fields

…ange

…lock

Include first-period execution costs in returns and drawdown without adding a synthetic bar. Store the baseline in schema 3 and preserve schema 2 and beta readers. Adds real Engine failing-base regression coverage for issue #155. Also includes the requested maintainer batching guidance.

…xports

Enable explicit bar capture while retaining complete account observation keys, including all-cash dates. Extend the existing schema 3 artifact with optional holdings and strict keys, retain unavailable legacy capture, and preserve equal-time execution order. Advances #155; capital flows and installed consumer qualification remain open.

…ct-v2

…ication

Reproduce the shared Python 3.15 failure through uv resolution. Bind selected packages, artifacts, markers and lock declarations while excluding the resolver prerelease permission alone. Preserve raw identities and all 17 accepted measurement records, and keep actual dependency drift rejection. Full suite: 2320 passed, 14 skipped. Fixes qualification of #151.

…esults

Apply validated delta/target schedules before decisions using actual marked NAV and preserve pre/post-flow valuations. Chain subperiod returns, retain reported NAV separately from investment wealth, and persist ordered flow applications. Extend accounting invariants to include independently recorded external capital without changing their tolerance. Adds public Engine and artifact regressions and a runnable guide. Advances #155; full qualification and migration integration remain open.

…esults

Capture the multiplier and declared currency used for each fill and export signed quantity. Preserve unknown legacy units and cost inclusion rather than reconstructing them from later configuration. Adds actual Engine/Parquet unit checks. Advances #155.

Capture post-fill and last-observed-session holdings through the existing account and fill journal, with explicit completeness and sequence keys. Keep investment returns on the original bar timeline and roll back observations with failed immediate callbacks. Reuse one marked snapshot implementation; preserve a valid zero mark in both carried valuations and open-trade PnL. The zero-mark regression fails twice on b49307a; focused account/lifecycle checks pass. Advances #155.

Keep detailed mark provenance out of ordinary valuation loops and enable timestamp history only when requested. Custom/legacy feeds may omit the new optional capital-events attribute. The real legacy feed run fails before the fix and passes afterward; 39 account/lifecycle/runtime checks pass, including the existing runtime regression gate. Advances #155.

Persist the actual signed-notional account method and expose producer metadata in legacy dictionary views. Ignore nonfinite replacement quotes while retaining valid zero marks and original mark provenance. Real getter and held-position workflows fail before the fix; 160 focused account/serialization/lifecycle checks pass. Document the upcoming release boundary and unknown legacy account declarations. Advances #155.

…iagnostic

…mance measurements

…parisons

…ble captures

…gers

…nges

… retained timing evidence