fix(postgres): skip replication-byte recorder in test-connection

[Tyagiquamar]

Summary

• test-connection runs in TEST_CONNECTION mode, which never registers replication metrics.
• PostgresModule still installed a jpgwire recorder that reads DATA_REPLICATED_BYTES, so the CLI failed with PSYNC_S0001 before the connection check ran.
• Skip that recorder in TEST_CONNECTION mode. Maintainer confirmed on Postgres test-connection fails because replication-byte metric is not registered #751 that metrics are not needed for this command.

Fixes #751

Test plan

• pnpm --filter @powersync/service-module-postgres exec vitest run test/src/metrics_recorder.test.ts (2 passed)
• test-connection against a valid PostgreSQL replication config reports the connection result instead of the missing-counter error

[changeset-bot]

🦋 Changeset detected

Latest commit: 8a4224c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 12 packages

Name	Type
@powersync/service-module-postgres	Patch
@powersync/service-schema	Patch
@powersync/service-image	Patch
@powersync/service-core	Patch
@powersync/service-module-convex	Patch
@powersync/service-module-core	Patch
@powersync/service-module-mongodb-storage	Patch
@powersync/service-module-mongodb	Patch
@powersync/service-module-mssql	Patch
@powersync/service-module-mysql	Patch
@powersync/service-module-postgres-storage	Patch
test-client	Patch

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