Audit Onyx export: extend key export rules for complete coverage

[MelvinBot]

Explanation of Change

Audits and extends the Onyx export key rules so every ONYXKEYS entry (top-level + COLLECTION.*) is explicitly categorized into one of three buckets:

1. ONYX_KEY_EXPORT_RULES — keys with per-field allowList/maskList for PII-aware export
2. safeOnyxKeys — keys safe to export as-is (booleans, IDs, config, timestamps)
3. onyxKeysToRemove — keys that must never leave the device (tokens, credentials, raw server data)

Key changes:

• COLLECTION.REPORT_ACTIONS explicit rule — preserves debug-useful fields (actionName, reportActionID, created, actorAccountID, pendingAction, errors, etc.) while masking message content (message, originalMessage, avatar, person)
• Wildcard allowList: ['*'] support — for keys like TRANSACTION_VIOLATIONS and POLICY_CATEGORIES that are completely safe and useful for debugging
• ~120 keys added to safeOnyxKeys — boolean flags, loading states, feature flags, simple IDs, and config values that contain no PII
• Expanded onyxKeysToRemove — added PRESERVED_USER_SESSION, PRESERVED_ACCOUNT, MAPBOX_ACCESS_TOKEN, RAM_ONLY_WALLET_ONFIDO, ONYX_UPDATES_FROM_SERVER, QUEUE_FLUSHED_DATA
• New export rules for ~30 additional keys — including PRIVATE_PERSONAL_DETAILS, LOGIN_LIST, PLAID_DATA, FUND_LIST, REPORT_DRAFT, TRANSACTION_DRAFT, WORKSPACE_CARDS_LIST, etc.
• Enforcement test — fails when a new ONYXKEYS entry is added without being categorized in one of the three buckets
• FORMS use maskFragileData fallback (dynamic user-entered fields with varying structure)
• DERIVED keys remain fully removed (unchanged)

Fixed Issues

$ #90977

Tests

// TODO: The human co-author must fill out the tests you ran before marking this PR as "ready for review"
// Please describe what tests you performed that validates your changed worked.

Offline tests

N/A — this change only affects the Onyx state export logic (Settings → Troubleshoot → Export Onyx state). No network-dependent behavior is modified.

QA Steps

// TODO: The human co-author must fill out the QA tests you ran before marking this PR as "ready for review".
// Please describe what QA needs to do to validate your changes and what areas do they need to test for regressions.

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
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  • Android: Native
  • Android: mWeb Chrome
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Screenshots/Videos

Android: Native

N/A — no UI changes

Android: mWeb Chrome

N/A — no UI changes

iOS: Native

N/A — no UI changes

iOS: mWeb Safari

N/A — no UI changes

MacOS: Chrome / Safari

N/A — no UI changes