Add market metadata, chart quotes, and account graph APIs

[snacsnoc]

This PR adds a few helpful of Wealthsimple calls I’ve been using in a side project for the last couple months, pulled from browser network traffic and wired into the main client. The helper methods were needed to make them usable from normal ticker input. The main value here is that it fills in a few obvious gaps on the read side without changing auth or order flow.

New functions:

• get_markets_metadata()
  Exchange-level metadata like open/close times and MIC codes
• get_market_buffer(country, is_option)
  Returns the market buffer multiplier Wealthsimple uses
• get_security_status(security_id)
  Returns the current trading status for a security
• get_intraday_chart_quotes(...)
  Returns Wealthsimple-native chart points with timestamps
• get_account_current_financials(account_id)
  Returns current account-level liquidation value, deposits, withdrawals, and returns.
• get_account_graph_data(...)
  Returns the account graph payload used for charting.
• parse_ticker_market(), _is_us_exchange(), _is_canadian_exchange(), resolve_security_id()
  Small glue helpers for inputs like TSLA.US and WCP.TO
  Parsing the ticker market and market checking were specific to my needs, so not sure if they would be helpful to others.

Overview:

get_intraday_chart_quotes() exposes Wealthsimple's own chart data instead of forcing callers to infer timing from quote snapshots or rely entirely on external feeds.

get_account_graph_data() and get_account_current_financials() do the same thing on the account side. Before this, the client had balances and historical financials, but not the broker native graph payload or a clean current financials read for a single account.

get_security_status() gives an explicit status check instead of guessing from quote data.

The ticker helpers are boring but necessary. If the caller has TICKER.MARKET input, they should not have to reimplement symbol parsing and exchange filtering outside the client.

The return values are plain dict/list/scalar values. resolve_security_id() caches hits after the first lookup, and saves an API call (note: spamming the WealthSimple API endpoint with a request every 30 seconds will give you 429s...) I left __typename in the payloads, stripping it would just add cleanup code for no real gain.

README was updated with the new calls.

Example shapes

Since this PR is adding several new features, I've added below some example outputs from the functions just as a reference.

ws.get_markets_metadata()

[
  {
    "__typename": "MarketMetadata",
    "cacheDate": "2026-03-13",
    "close": "16:00:00",
    "date": "2026-03-13",
    "exchangeName": "NASDAQ",
    "lastOpenDate": "2026-03-12",
    "lastOpenTime": "09:30:00",
    "mic": "XNAS",
    "nextOpenDate": "2026-03-16",
    "nextOpenTime": "09:30:00",
    "open": "09:30:00"
  }
]

ws.get_market_buffer(country="CA")

1.006

ws.get_security_status("sec-s-6e73535b8e474d8689064c4c9fee326a")

{
  "__typename": "Security",
  "id": "sec-s-6e73535b8e474d8689064c4c9fee326a",
  "optionDetails": None,
  "status": "TRADING"
}

ws.get_intraday_chart_quotes(...)

[
  {
    "__typename": "ChartBarQuote",
    "currency": "CAD",
    "marketStatus": "OPEN",
    "price": "17.1000",
    "securityId": "sec-s-6e73535b8e474d8689064c4c9fee326a",
    "sessionPrice": "17.1000",
    "timestamp": "2026-03-13T13:30:00Z"
  }
]

ws.get_account_current_financials("my-wealthsimple-account-id")

{
  "__typename": "AccountCurrentFinancials",
  "id": "my-wealthsimple-account-id-CAD",
  "netLiquidationValueV2": {
    "__typename": "Money",
    "amount": "580.08505",
    "cents": 58009,
    "currency": "CAD"
  },
  "netDeposits": {
    "__typename": "Money",
    "amount": "954.22",
    "cents": 95422,
    "currency": "CAD"
  },
  "simpleReturns": {
    "__typename": "SimpleReturns",
    "amount": {
      "__typename": "Money",
      "amount": "0.00765",
      "cents": 1,
      "currency": "CAD"
    },
    "asOf": None,
    "rate": "0.000013",
    "referenceDate": "2026-03-09"
  }
}

ws.get_account_graph_data("my-wealthsimple-account-id")

{
  "previousClose": {
    "__typename": "HistoricalGraphDataPoint",
    "dateTime": "2026-03-09T20:00:00.000Z",
    "netLiquidationValue": {
      "__typename": "Money",
      "amount": "580.0774",
      "currency": "CAD"
    }
  },
  "data": [
    {
      "__typename": "HistoricalGraphDataPoint",
      "dateTime": "2026-03-10T13:30:00.000Z",
      "netDeposits": {
        "__typename": "Money",
        "amount": "954.22",
        "currency": "CAD"
      },
      "netLiquidationValue": {
        "__typename": "Money",
        "amount": "580.271",
        "currency": "CAD"
      }
    }
  ]
}

ws.resolve_security_id("WCP.TO")

"sec-s-ab88ccb65fe24dcc991215e07eea2e41"

ws.parse_ticker_market("TSLA.US")

("TSLA", "US")

ws._is_us_exchange("NASDAQ")

True

ws._is_canadian_exchange("TSX")

True