fix(postgres-js): don't override Date serializer, only the parser (#5789)

[momomuchu]

Summary

drizzle() for the postgres-js driver overrides postgres.js's outbound timestamp/date serializers alongside its inbound parsers, when only the parsers were meant to be overridden (see porsager/postgres#761). This breaks every ${jsDate} parameter passed through a raw sql template, throwing TypeError [ERR_INVALID_ARG_TYPE] from postgres.js's Bind() step.

Closes #5789

Root cause

src/postgres-js/driver.ts, in construct():

for (const type of ['1184', '1082', '1083', '1114', '1182', '1185', '1115', '1231']) {
  client.options.parsers[type as any] = transparentParser;
  client.options.serializers[type as any] = transparentParser; // <- rebinds outbound serializer too
}

postgres.js's default serializer for OID 1184 is x => (x instanceof Date ? x : new Date(x)).toISOString(). After this override the passthrough returns the raw Date unchanged; postgres.js's Bind() then calls Buffer.byteLength(date), which throws.

Fix

Drop the serializer override from the date-OID loop; keep only the parser override (the documented intent per porsager/postgres#761). The unrelated json/jsonb serializer overrides (OIDs 114/3802) are untouched.

Alternative considered and rejected: keep a serializer override but make it "actually serialize" (x => x instanceof Date ? x.toISOString() : x). Rejected, it duplicates postgres.js's own default Date serializer and risks drifting from its implementation. Dropping the override and falling back to postgres.js's default is narrower.

Tests

• tests/postgres-js/driver.test.ts (new): source-level unit test against the real construct() using an unconnected postgres.js client (no live DB, postgres.js only opens a socket on first query). Asserts the outbound serializer for OID 1184 still matches postgres.js's default and produces a wire-safe string, while the inbound parser stays neutralized. RED (before): 1 failed / 1 passed → GREEN (after): 2 passed.
• integration-tests/tests/pg/postgres-js.test.ts (new case, insert via raw sql with a Date param does not throw (#5789)): end-to-end reproduction against a timestamptz column. This test requires a live Postgres and was not executed in my environment, included for CI/reviewer verification.

Verification run locally

• vitest run (drizzle-orm package): 568/568 passed
• tsc -p tests/tsconfig.json --noEmit (strict): 0 errors
• dprint check + eslint on changed files: clean