OpenAPI schema missing investment_loan account type and TransactionAccount fields

[poodle64]

The OpenAPI schema in this repo is missing fields that the live API returns, causing deserialisation failures when using generated API clients.

We discovered these discrepancies while auditing our generated PocketSmith API client using Claude Code, which validated the generated client against the live API and identified fields present in responses but absent from the schema.

1. Missing investment_loan account type

The Account.type enum lists 11 values but the API returns investment_loan as a valid type. This value is not present in any of the type enums in the schema (Account, TransactionAccount, or the request bodies for PUT/POST account endpoints).

Reproduction:
```bash
curl -H "Authorization: Token <api_key>"
https://api.pocketsmith.com/v2/users/<user_id>/accounts
```

Response includes accounts with "type": "investment_loan".

Expected: investment_loan should be listed in the type enum alongside bank, credits, cash, stocks, mortgage, loans, vehicle, property, insurance, other_asset, other_liability.

2. Missing TransactionAccount properties

The TransactionAccount schema is missing several properties that the API returns:

Field	Type	Description
account_id	integer	The parent account ID
latest_feed_name	string (nullable)	Name of the latest data feed
offline	boolean	Whether the account is offline
is_net_worth	boolean	Whether included in net worth
include_in_net_worth	boolean	Whether should be included in net worth
current_balance_source	string (nullable)	Source of balance data (e.g. `"data_feed"`)

Reproduction:
```bash
curl -H "Authorization: Token <api_key>"
https://api.pocketsmith.com/v2/users/<user_id>/transaction_accounts
```

All six fields are present in every TransactionAccount object in the response.

Impact

Generated API clients (using openapi-generator or similar tools) cannot access these fields as typed attributes because they are not in the schema. Clients must work around this using raw response data or additional_properties handling.

Environment

• API version: v2
• Tested: 2026-04-11
• Schema commit: 8e964ca (2025-12-03)