fix(verification): canonicalize tuple ABI signatures

[skyc1e]

Contract verification currently persists tuple inputs as raw ABI types, so submit((address,uint256)) is stored and hashed as submit(tuple). Verified-contract lookup then returns the incorrect signature and selector.

Share the existing recursive ABI parameter formatter between lookup and verification persistence. Add four regressions exercising verification → database signatures → lookup for functions, events, errors, nested tuples, and fixed/dynamic tuple arrays.

Validation:

• All 260 contract-verification tests pass, including four regressions observed failing before the fix. The local Cloudflare test pool disables outbound requests and remote bindings; the new regressions inject compiler/RPC responses.
• Root pnpm check and pnpm check:types pass. Changed files have no Biome warnings; unrelated existing warnings remain.
• All six configured pre-commit checks pass through equivalent repo-local builtin/system execution. The original hook installer was not run because it would install Python/Go environments.

This fixes new signature writes. Historical incorrect signature rows require a separate repair; reverification adds canonical links but does not remove previous incorrect links.