feat(m7.5d): TypeScript reins CLI over a reflected SQLite database

[shamspias]

The zero-code path for the TS port: point the reins CLI at a SQLite database and inspect/ask/chat over it — the mirror of the Go CLI.

• cli/sqlite.ts: live schema reflection via the built-in node:sqlite (ZERO new deps). reflectSqlite reads PRAGMA table_info/index_list into the same ORM-neutral ModelInfo the Drizzle path uses, so it flows straight through the shared buildCapabilities (intent names, natural-key lookups, linting, trimming, schema index). SqliteBackend runs the six ops as parameterized SQL with validated + double-quoted identifiers (§2.6) and boolean/value coercion for SQLite binding.
• cli/cli.ts: inspect / ask / chat as plain functions taking a line Writer and a reins.Model, so they test with a FakeModel and no network. ask/chat build a read_only agent (writes aren't generated); inspect --write reveals the gated create/update/delete. openDb accepts ./app.db, :memory:, sqlite:/// URLs, file: URIs.
• cli/main.ts: the reins bin (package.json bin) — inspect/ask/chat/version, --model (provider:model) or env auto-detect, --write. node:sqlite is imported lazily so version/help don't emit its experimental-feature warning.
• tests: cli.test.ts covers inspect (read-only vs --write), FakeModel-driven ask/chat, and openDb happy/hinted-error paths.

Verified: make js-check green — format, typecheck, 143 tests (142 pass, 1 skip); a built bin smoke-tested against a real SQLite file (reflected a table, chose the unique non-pk column as the natural key, gated writes behind --write).