Resolve context.TODO() and add context argument

[abicky]

Description

This PR is the third phase and part of the fourth phase of the integration with OpenTelemetry described on #153.

In the first part of the commits, I have added a context argument to the methods called from various code and added context.TODO() to each caller. I have also made the downstream methods (the methods called from the method) use the context argument appropriately and added a context argument if necessary.

In the second part of the commits, I have replaced context.TODO() with cmd.Context() in the cmd package and made the downstream methods use the context argument appropriately.

In the following PRs (the fourth phase), I will do the same thing in other repositories.

Behavior changes

This PR also makes the relayer shutdown gracefully (526ab84) when it receives SIGINT and SIGTERM.
Here is the output from the relayer started by service start when I pressed ^C:

Before

^C

After

^C{"time":"2025-02-27T18:13:43.798834915+09:00","level":"INFO","source":{"function":"github.com/hyperledger-labs/yui-relayer/cmd.notifyContext.func1","file":"/home/arabiki/.local/share/mise/installs/go/1.23.2/packages/pkg/mod/github.com/abicky/[email protected]/cmd/root.go","line":141},"msg":"Received SIGINT. Shutting down..."}
2025/02/27 18:13:44 context canceled

What I have checked

I have confirmed that there is no longer context.TODO() as follows:

% git grep 'context\.TODO' | wc
      0       0       0

I have also ensured that the CI passes in the following repositories:

• https://github.com/datachainlab/yui-relayer-build/tree/refs/heads/intergate-with-opentelemetry
  • https://github.com/datachainlab/yui-relayer-build/actions/runs/13578275247
  • https://github.com/datachainlab/yui-relayer-build/actions/runs/13578275252
  • https://github.com/datachainlab/yui-relayer-build/actions/runs/13578275249
• Use latest packages with context datachainlab/cosmos-ethereum-ibc-lcp#71
  • https://github.com/datachainlab/cosmos-ethereum-ibc-lcp/actions/runs/13578334544

[abicky]

@siburu @dai1975 Can you review the changes?