chore(deps): bump github.com/gotd/td from 0.131.0 to 0.154.0

[ernado]

Supersedes #731 (which Dependabot cannot complete on its own, because the upgrade requires a code change).

Summary

gotd/td migrated structured logging from *zap.Logger to the github.com/gotd/log.Logger interface, so telegram.Options.Logger no longer accepts a *zap.Logger directly:

cannot use logger.Named("client") (*zap.Logger) as "github.com/gotd/log".Logger
value in struct literal: *zap.Logger does not implement "github.com/gotd/log".Logger
(missing method Enabled)

This bumps github.com/gotd/td to v0.154.0 and bridges the zaptest logger in tg_io/download_test.go with github.com/gotd/log/logzap, as recommended by the telegram.Options docs.

Test plan

• go build ./..., go vet ./..., go test ./tg_io/..., golangci-lint run all pass.

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