fix(python): key query rows in projection order

[thekevinbot]

Fixes #1173

db.query() returned dicts built by iterating the core's row HashMap, so key order was hash order and changed from run to run. The binding now calls the core's query_ordered and builds each dict by walking columns, so list(row) is the order the SELECT list names (SELECT * follows the declared column order).

API shape: no new surface. Python dicts keep insertion order, so the guarantee lives on the rows query() already returns. A separate query_ordered accessor was the alternative; it was not added because the only thing it would add is a column list for a zero-row result.

Red/green

The test commit (f4e1847) went up alone. CI (dirsql Python CI / Binding tests, run 35994439070) failed on the new test for the asserted reason on 3.10, 3.12 and 3.13:

FAILED tests/integration/binding/column_order_test.py::describe_query_column_order::it_keys_rows_in_the_select_list_order
AssertionError: assert ['e', 'g', 'c'...'a', 'h', ...] == ['f', 'c', 'h'...'e', 'b', ...]

Manual run

SELECT path, ctime, size FROM './' ORDER BY path -> [{'path': 'a.md', 'ctime': 1790250329, 'size': 6}, ...]
SELECT size, basename, path FROM './' ORDER BY path -> [{'size': 6, 'basename': 'a.md', 'path': 'a.md'}, ...]
SELECT 1 AS z, 2 AS a, 3 AS m -> [{'z': 1, 'a': 2, 'm': 3}]

E2E Verification

• Ran e2e suites locally for every affected SDK
• Python SDK e2e: pass
• TypeScript SDK e2e: N/A
• Rust core e2e (if applicable): N/A (no packages/rust change)
• packages/python/e2e-attestations/<branch>.json receipt written if packages/python changed (just e2e-attest-python)
• packages/ts/e2e-attestations/<branch>.json receipt written if packages/ts changed (just e2e-attest-ts) — N/A
• Command(s) run: just e2e-attest-python, uv run python -m pytest tests/integration/binding/, just preflight
• Result summary: python e2e 38 passed; binding 108 passed; preflight 0 failing pairs.

Changelog / Migrations

• Changelog fragment added under <root>/<pkg>/changelog.d/ for each changed package (packages/python/changelog.d/2026-09-24-query-rows-in-projection-order.md)
• Migration fragment added under <root>/<pkg>/migrations.d/ (packages/python/migrations.d/2026-09-24-query-rows-in-projection-order.md -- key order changes from per-process hash order to projection order; no code change required)

Parity

Closes the last projection-order drift: Python rows are keyed in projection order; Rust and TypeScript expose query_ordered / queryOrdered. PARITY.md updated; docs/reference/sdk.md notes the Python guarantee and points Rust and TypeScript callers at queryOrdered.