fix(driver-sql): self-heal numeric type fidelity on legacy SQLite columns + extend dogfood matrix

[os-zhuang]

Follow-up to #2025. Two gaps that fix left open:

1. Legacy columns don't get the fix

#2025 mapped rating/slider/progress to numeric columns — but only for newly created columns. SQLite never alters a column's type in place, and the schema reconciler (sql-driver.ts initObjects) only ADDS missing columns. So a column created before the fix keeps its TEXT affinity and would still read back '4' instead of 4 forever. (toggle/record/video/audio already self-heal because their fix routes through the read-side booleanFields/jsonFields registries — the numeric scalars were the odd ones out, relying on column affinity alone.)

Fix: a read-side numeric coercion — the new numericFields registry, single-sourced from NUMERIC_SCALAR_TYPES — coerces numeric-looking stored strings back to numbers on read, mirroring how dateFields already repairs legacy timestamp-typed Field.date rows. Fidelity no longer depends on column affinity alone.

• Only strings are touched — a fresh REAL/INTEGER column already yields a number (no-op).
• null stays null (not 0); genuinely non-numeric junk is preserved (not NaN).
• SQLite-gated (Postgres/MySQL return typed numerics natively).

2. progress/record/video/audio were only unit-tested

The audit in #2025 also fixed progress (numeric) and record/video/audio (object→JSON), but those were only covered by the driver unit test. Extended the dogfood field-zoo HTTP matrix to guard them over real HTTP too.

Verification

• New unit test reproduces a legacy TEXT column (pre-create as TEXT → initObjects must not alter it) and proves a stored '4' reads back as 4; a sibling test asserts null/'n/a' are left intact.
• Full driver-sql suite: 160 passed (was 158).
• Dogfood field-zoo HTTP round-trip: 26 passed (was 22) — progress/record/video/audio now guarded end-to-end.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
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📓 Docs Drift Check

This PR changes 2 package(s): @objectstack/dogfood, @objectstack/driver-sql.

8 hand-written doc(s) reference the affected code and may need an implementation-accuracy re-verification:

• content/docs/concepts/core/plugins.mdx (via @objectstack/driver-sql)
• content/docs/concepts/implementation-status.mdx (via @objectstack/driver-sql)
• content/docs/concepts/terminology.mdx (via @objectstack/driver-sql)
• content/docs/getting-started/glossary.mdx (via @objectstack/driver-sql)
• content/docs/guides/driver-configuration.mdx (via @objectstack/driver-sql)
• content/docs/guides/packages.mdx (via @objectstack/driver-sql)
• content/docs/protocol/objectos/index.mdx (via @objectstack/driver-sql)
• content/docs/protocol/objectos/lifecycle.mdx (via @objectstack/driver-sql)

Advisory only. To re-verify, run the docs-accuracy-audit workflow scoped to these files:
node scripts/docs-audit/affected-docs.mjs origin/main → pass the list as args.docs.