feat: add LINK token to mainnet token list

[dak-agent]

Summary

Adds mainnet/LINK (Chainlink's LINK on Monad mainnet) with a true-vector logo and fully-verified extensions, produced end-to-end with the repo's own add-token skill (scaffold → bridge probe → CoinGecko → cross-chain → logo → validate).

• address: 0x76f257B1DDA5cC71bee4eF637Fbdde4C801310A9 (chainId 143)
• name / symbol / decimals: ChainLink Token / LINK / 18 — on-chain verified

extensions

• coinGeckoId: chainlink — address-verified (the Monad address is in CoinGecko's contract map).
• bridgeInfo: Chainlink CCIP, bridge 0x33566fE5976AAa420F3d5C64996641Fc3858CaDB — detected on-chain via the token's CCIP token pool; the bridge address matches the validator's expected CCIP registry.
• crossChainAddresses: all 10 supported chains, each verified on its own chain (symbol + decimals) before writing — no same-address guesses.

Chain	Address	On-chain	Source
1 Ethereum	0x514910771AF9Ca656af840dff83E8264EcF986CA	LINK / 18	CCIP directory + CoinGecko
10 Optimism	0x350a791Bfc2C21F9Ed5d10980Dad2e2638ffa7f6	LINK / 18	CoinGecko
56 BNB	0xF8A0BF9cF54Bb92F17374d9e9A321E6a111a51bD	LINK / 18	CoinGecko
137 Polygon	0x53E0bca35eC356BD5ddDFebbD1Fc0fD03FaBad39	LINK / 18	CoinGecko
999 HyperEVM	0x1AC2EE68b8d038C982C1E1f73F596927dd70De59	LINK / 18	CoinGecko
8453 Base	0x88Fb150BDc53A65fe94Dea0c9BA0a6dAf8C6e196	LINK / 18	CCIP directory + CoinGecko
9745 Plasma	0x76a443768A5e3B8d1AED0105FC250877841Deb40	LINK / 18	CCIP directory + CoinGecko
42161 Arbitrum	0xf97f4df75117a78c1A5a0DBb814Af92458539FB4	LINK / 18	CoinGecko
42220 Celo	0xd07294e6E917e07dfDcee882dd1e2565085C2ae0	LINK / 18	CCIP directory + CoinGecko
43114 Avalanche	0x5947BB275c521040051D82396192181b413227A3	LINK.e / 18	CoinGecko

Override: on Avalanche the canonical bridged token trades as LINK.e, recorded as a symbol override for chain 43114 per the repo's override rule. Identity is confirmed (CoinGecko lists it under chainlink, 18 decimals on-chain).

Logo

mainnet/LINK/logo.svg is a true vector: the official Chainlink brand-icon hexagon path, white on a #0847F7 circle (the icon's own blue), 256×256. Hexagon size and padding match the CoinGecko reference mark, kept on a circular background.

Validation

validate_tokens.py LINK --validate-cross-chain → "LINK is valid" (the exact CI checks, all 10 chains verified). data.json is jq --indent 2 canonical. tokenlist-mainnet.json is intentionally untouched — it regenerates on merge.