Add LogZero to Aggregators & Dashboards

[and1hof]

Adds LogZero to the Applications and Platforms → Aggregators & Dashboards category (appended to the bottom, per the contributing guidelines).

- [LogZero](https://logzero.app) - All-in-one private tracker (mood, food, weight, meds, exercise) with a local correlation engine that surfaces what actually moves your mood and weight; fully on-device, no account (iOS).

Why it's awesome: LogZero is an all-in-one self-tracking app (mood, medication, food with calories/macros, exercise, meditation, weight, to-dos) with a built-in local statistical correlation engine that surfaces what actually moves your mood and weight, plus a dashboard with streaks and weekly insights. Unlike most aggregators here, everything runs 100% on-device — no account, no ads, no analytics/telemetry, and zero network requests for your data (AES-256 at rest; App Store privacy label "Data Not Collected"). Optional user-controlled encrypted export/backup (CSV/JSON/encrypted).

• Website: https://logzero.app
• App Store: https://apps.apple.com/app/id6773557137

Checklist

• Searched previous suggestions — not a duplicate.
• Format [resource](link) - Description. with link and platform marker, matching neighboring entries.
• Added to the bottom of the relevant category.
• Starts with a capital, ends with a period; does not mention "Quantified Self".
• No trailing whitespace.
• Individual pull request for this single suggestion.