Problem
The journalism-investigation plugin needs entity entry types beyond what Pyrite core provides (person, organization). Investigative journalism tracks assets, financial accounts, and source documents as first-class entities.
Scope
Create 3 new entry types in the plugin:
`asset` (AssetEntry)
Extends: Entry
Fields: `asset_type` (real_estate, vehicle, vessel, aircraft, luxury_good, intellectual_property, other), `value`, `currency`, `jurisdiction`, `registered_owner`, `acquisition_date`, `description`
Importance field inherited`account` (AccountEntry)
Extends: Entry
Fields: `account_type` (bank, brokerage, crypto_wallet, shell_company, trust, other), `institution`, `jurisdiction`, `holder`, `opened_date`, `closed_date`
Importance field inherited`document_source` (DocumentSourceEntry)
Extends: SourceEntry
Fields: `reliability` (high, medium, low, unknown), `classification` (public, leaked, foia, court_filing, financial_disclosure, corporate_registry, other), `obtained_date`, `obtained_method`Person and organization are reused from Pyrite core — no new types needed.
Acceptance Criteria
All 3 types registered in ENTRY_TYPE_REGISTRY via plugin
Round-trip: create → save → load preserves all fields
Validators enforce required fields (asset_type, account_type, reliability)
Types show in `pyrite sw components` when plugin is installed
Subdirectory: `entities/` for all 3 types