feat(money): integer micro-dollar storage (#38)#44
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Closes #38. Money was stored as REAL USD, which drifts when summing many sub-cent rows. Switch storage to integer micro-dollars (1 USD = 1_000_000 micros) so ledger balances and spend totals are exact, while keeping the public API in float USD. - db.py: SCHEMA_VERSION=4; usd_to_micros/micros_to_usd helpers; money cols -> INTEGER (cost_micros, delta_micros, balance_after_micros, monthly_budget_micros); idempotent v3->v4 migration with exact backfill; row accessors expose float-USD aliases at the boundary. - metering.py / reports.py: aggregate on *_micros, convert to USD at edges. - tests/test_micros.py: conversion round-trip, exact summation over 10k sub-cent debits, integer-column assertions, v3->v4 migration + idempotency.
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…ELOG Both 1.0 launch-gate milestones are merged in code but the version was stuck at 0.5.1 with no changelog entries for either: - v0.6 money & concurrency correctness (#26–#30, #38) — merged via #41/#44. - v0.7 security hardening (#31–#37) — merged via #42. Bump version (pyproject + __init__) to 0.7.0 and add [0.6.0] and [0.7.0] CHANGELOG sections so the version reflects reality. No behavior change; no launch switches flipped — the roadmap's v0.7 exit (external security review) remains a separate human gate before public launch. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
tcconnally
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…ELOG (#45) Both 1.0 launch-gate milestones are merged in code but the version was stuck at 0.5.1 with no changelog entries for either: - v0.6 money & concurrency correctness (#26–#30, #38) — merged via #41/#44. - v0.7 security hardening (#31–#37) — merged via #42. Bump version (pyproject + __init__) to 0.7.0 and add [0.6.0] and [0.7.0] CHANGELOG sections so the version reflects reality. No behavior change; no launch switches flipped — the roadmap's v0.7 exit (external security review) remains a separate human gate before public launch. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Closes #38. Money was stored as
REALUSD, which accumulates float drift when summing many sub-cent ledger rows. This switches storage to integer micro-dollars (1 USD = 1,000,000 micros) so balances and spend totals are exact, while keeping the entire public API and templates in float USD.Changes
SCHEMA_VERSION = 4;usd_to_micros/micros_to_usdhelpers +MICROS_PER_USD; money columns nowINTEGER(cost_micros,delta_micros,balance_after_micros,monthly_budget_micros); idempotent v3->v4 migration (_migrate_money_to_micros) that ALTERs, backfillsround(usd*1e6), and drops legacy columns; row accessors expose float-USD aliases so callers, views, reports, and Stripe code are unchanged.SUM(cost_usd)/SUM(delta_usd)aggregate on the*_microsinteger columns and convert to USD once at the boundary.Tests
tests/test_micros.py(9 new): conversion round-trip & rounding, exact summation over 10,000 sub-cent debits (no drift), integer-column assertions, and v3->v4 migration + idempotency. Full suite: 102 passed (93 existing + 9 new). Python 3.9-safe, stdlib only.