Add mid to stock quotes

[mxiao-cll]

Add mid which is calculated by (bid price x bid volume + ask price x ask volume) / (bid volume + ask volume)

{
    "result": null,
    "data": {
        "mid_price": 397.6909677419354,
        "bid_price": 397.42,
        "bid_volume": 46,
        "ask_price": 397.78,
        "ask_volume": 140
    },
    "timestamps": {
        "providerDataStreamEstablishedUnixMs": 1763480966345,
        "providerDataReceivedUnixMs": 1763480969722
    },
    "statusCode": 200,
    "meta": {
        "adapterName": "DXFEED",
        "metrics": {
            "feedId": "{\"base\":\"tsla\"}"
        }
    }
}

https://smartcontract-it.atlassian.net/browse/OPDATA-4774
https://smartcontract-it.atlassian.net/browse/OPDATA-4775

PRD: https://docs.google.com/document/d/1PVuwVubUOE_o8gJlrLfccU71v2WZKB66TULWMkODXQc/edit?tab=t.0#heading=h.btjmqsp0rgk7

[changeset-bot]

🦋 Changeset detected

Latest commit: 216d1ad

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 15 packages

Name	Type
@chainlink/dxfeed-adapter	Minor
@chainlink/finage-adapter	Minor
@chainlink/token-allocation-adapter	Patch
@chainlink/apy-finance-adapter	Patch
@chainlink/bsol-price-adapter	Patch
@chainlink/crypto-volatility-index-adapter	Patch
@chainlink/curve-3pool-adapter	Patch
@chainlink/defi-dozen-adapter	Patch
@chainlink/defi-pulse-adapter	Patch
@chainlink/dxdao-adapter	Patch
@chainlink/linear-finance-adapter	Patch
@chainlink/savax-price-adapter	Patch
@chainlink/set-token-index-adapter	Patch
@chainlink/vesper-adapter	Patch
@chainlink/xsushi-price-adapter	Patch

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[mmcallister-cll]

looks fine as impl, PRD has some recent comments from Dan that haven't been answered yet though