docs(client): fix notifications.list README example to use real read option

[os-help]

Fixes #6927

packages/client/README.md's only usage example for client.notifications.list showed { unreadOnly: true }. That key has never existed in the implementation — packages/client/src/index.ts declares the real options as { read?: boolean; type?: string; limit?: number }, and unreadOnly is read by nothing on either client or server. An author (or AI author) copying the example gets a silently ignored key and an unfiltered list.

Change

Replaced the example with the semantic equivalent using the real option:

-await client.notifications.list({ unreadOnly: true });
+await client.notifications.list({ read: false }); // unread only

Scope

Single-hunk, README-only change. Grepped all of packages/client for other unreadOnly occurrences — none found outside this one line.

No behavior change, no changeset needed (docs-only).

Generated by Claude Code

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Generated by Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
objectstack	Ignored		Aug 10, 2026 2:27am

[github-actions]

📓 Docs Drift Check

This PR changes 1 package(s): @objectstack/client.

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

• content/docs/ai/skills-reference.mdx (via packages/client)
• content/docs/api/client-sdk.mdx (via @objectstack/client)
• content/docs/api/data-flow.mdx (via @objectstack/client)
• content/docs/api/environment-routing.mdx (via @objectstack/client)
• content/docs/api/error-catalog.mdx (via @objectstack/client)
• content/docs/getting-started/your-first-project.mdx (via @objectstack/client)
• content/docs/kernel/runtime-services/data-service.mdx (via @objectstack/client)
• content/docs/kernel/runtime-services/index.mdx (via packages/client)
• content/docs/permissions/authentication.mdx (via @objectstack/client)
• content/docs/plugins/packages.mdx (via @objectstack/client)
• content/docs/protocol/kernel/realtime-protocol.mdx (via @objectstack/client)

⛔ 3 release-owned page(s) also reference the affected code. These are read-only:

• content/docs/releases/implementation-status.mdx (via @objectstack/client)
• content/docs/releases/v16.mdx (via @objectstack/client)
• content/docs/releases/v17.mdx (via @objectstack/client)

content/docs/releases/ is RELEASE-OWNED (AGENTS.md "Documentation Guardrails"): release
notes are written centrally at release time, and a code PR that edits them is the exact PR
that guardrail exists to stop. They are still audited — read-only. If one of them is actually
wrong, file an issue or open a dedicated docs-only PR; do not edit it here.

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.