Add OUSD rebalancer schedule (manual, disabled) (#2933)

Adds an `ousd_rebalancer` row to the Talos schedules seed so the OUSD
Rebalancer action shows up in the Talos admin UI and can be triggered
manually via "Run now". The hardhat task `ousdRebalancer` was already
registered (and thus in the actions catalog), but with no `schedules`
row it was neither listed nor runnable from the UI — the runner only
dispatches by scheduleId (POST /runs/:scheduleId) and the ad-hoc
arbitrary-command endpoint was removed.

Seeded with enabled=false and the placeholder cron `0 0 1 1 *`, matching
the existing manual-only rows (stake_validator, queue_proposal, ...), so
it never fires on a schedule — only on an operator-initiated Run now.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: clement-ux

contracts/migrations/seed_schedules.sql

@@ -54,6 +54,7 @@ INSERT INTO schedules (product, name, command, cron_expr, timezone, enabled, not
 ('origin-dollar', 'module_rebase_mainnet',                    'cd /app && pnpm hardhat permissionedRebase --network mainnet',           '15 10,22 * * *',        'UTC', false, NULL),
 ('origin-dollar', 'module_rebase_base',                       'cd /app && pnpm hardhat permissionedRebase --network base',              '15 10,22 * * *',        'UTC', false, NULL),
 ('origin-dollar', 'module_rebase_sonic',                      'cd /app && pnpm hardhat permissionedRebase --network sonic',             '15 10,22 * * *',        'UTC', false, NULL),
+('origin-dollar', 'ousd_rebalancer',                          'cd /app && pnpm hardhat ousdRebalancer --network mainnet',               '0 0 1 1 *',             'UTC', false, 'Manual: Run now to rebalance OUSD Morpho strategies'),
 ('origin-dollar', 'queue_proposal',                           'cd /app && pnpm hardhat queueGovernorSixProposal --network mainnet',     '0 0 1 1 *',             'UTC', false, 'Manual: add --propid then Run now'),
 ('origin-dollar', 'execute_proposal',                         'cd /app && pnpm hardhat executeGovernorSixProposal --network mainnet',   '0 0 1 1 *',             'UTC', false, 'Manual: add --propid then Run now')
 ON CONFLICT (product, name) DO NOTHING;