feat: add Forma (chain 984122) to assets-controllers spot price support

[jeremy-consensys]

Explanation

Forma (eip155:984122) uses TIA (Celestia) as its native gas token. Today, CodefiTokenPricesServiceV2.validateChainIdSupported returns false for Forma because its chain ID is not listed in SPOT_PRICES_SUPPORT_INFO, so the extension and mobile clients never even request a spot price for TIA — users see no price when they add Forma as a custom network.

Forma had a working price previously via the SimpleHashService fallback in va-mmcx-price-api. That fallback was removed in va-mmcx-price-api#409, leaving CoinGecko as the only remaining path. CoinGecko does not recognise Forma as an EVM asset platform (Celestia is Cosmos-based), so the chain → contract-address lookup path doesn't work for Forma. The same approach already shipped for Sei (0x531 / slip44:19000118) and Injective (slip44:22000119) applies here: point Forma's native asset at CoinGecko's celestia coin directly instead of relying on the platform-indexed path.

This PR adds:

'0xf043a': 'eip155:984122/slip44:984122', // Forma - Native symbol: TIA (Celestia)

to SPOT_PRICES_SUPPORT_INFO. slip44:984122 is a chain-id-derived pseudo-ref mirroring the slip44:8453 convention used for Base governance, chosen over slip44:118 (Cosmos Hub / ATOM) to avoid collision if ATOM is ever priced through slip44. The ref matches the companion mapping added to va-mmcx-price-api, which resolves it to CoinGecko's celestia coin id.

SUPPORTED_CHAIN_IDS is derived from SPOT_PRICES_SUPPORT_INFO, so the existing parameterised validateChainIdSupported test (codefi-v2.test.ts) picks up the new entry automatically. No fixture updates were required.

The same pattern will apply to Eden and any future Celestia-based EVM rollup once their chain IDs are published.

References

• Chain: https://chainlist.org/chain/984122
• CoinGecko coin: https://www.coingecko.com/en/coins/celestia
• Companion PR in va-mmcx-price-api: feat/add-forma-tia-price (adds Caip2ChainId.FORMA, SLIP44_ASSET_MAP[FORMA], and SLIP44_ASSET_CONFIGS['slip44:984122'] → 'celestia')
• Removal that triggered the regression: https://github.com/consensys-vertical-apps/va-mmcx-price-api/pull/409

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
Low risk: adds a single new SPOT_PRICES_SUPPORT_INFO mapping for one chain plus changelog entry, with no behavioral changes beyond enabling price lookups for that network.

Overview
Enables spot price fetching for Forma (eip155:984122) by adding a new SPOT_PRICES_SUPPORT_INFO entry mapping its native gas token (TIA) to slip44:984122, allowing the price API to resolve it via CoinGecko.

Updates the assets-controllers changelog to document the new network/asset mapping.

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