Revamp admin storage usage economics

[benben]

Summary

• make the admin usage views storage-only and aggregate historical team-stamped rows by organization
• replace editable compute scenarios with fixed US/EU progressive customer storage pricing
• separate allocated AWS us-east-1 S3 list cost, customer price, gross profit, and gross margin
• explain GiB-hours, binary units, cost, price, and margin with accessible tooltips
• add WTD/MTD presets to organization usage

Pricing model

• converts retained GiB-hours to GiB-month using the actual hours in the selected UTC calendar month
• prices each organization independently under the selected customer schedule
• applies AWS S3 Standard tiers to aggregate usage in the view, then allocates that list-rate estimate by usage
• labels the AWS figure as an estimate rather than an invoice or CUR charge

Testing

• just ui-test (178 tests, typecheck, production build)
• just lint
• just ci passes lint/unit/scenario suites; the local integration recipe has unrelated existing catalog-state failures after cursor/USE tests

[github-actions]

Test Impact Plan

Deterministic summary of how this PR changes tests, CI runners, and coverage-risk signals.

Summary

Area	Added	Changed	Deleted
Test files	0	0	0
E2E/journey files	0	0	0
Workflow files	0	0	0

Signals

• Test cases: +0 / -0
• Assertions: +0 / -0
• Skips or known failures added: 0
• Workflow continue-on-error added: 0
• Workflow path filters added: 0
• Test commands removed from justfile: 0
• E2E/journey retry lines added: 0

Coverage risk: neutral or increased

No coverage-reduction warnings detected.