Add global --ca-cert and persist connection options in alias add

[atimin]

Closes #188

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• CHANGELOG.md has been updated (for bug fixes / features / docs)

What kind of change does this PR introduce?

Feature

What was changed?

• Added global --ca-cert <path> CLI option and propagated explicit global-option override metadata through CliContext.
• Extended alias config schema to persist connection options in alias add: ignore_ssl, timeout, parallel, and ca_cert (with backward-compatible defaults for existing configs).
• Added resolve_connection_options to merge alias defaults with global CLI overrides.
• Applied resolved options to client creation (verify_ssl, timeout, CA certificate file).
• Updated cp and rm query parameter parsing to reuse alias-specific timeout/parallel defaults from source aliases.
• Added tests for:
  • persisting alias connection options,
  • resolving alias/default override precedence,
  • applying alias timeout/parallel defaults in query parsing.

Related issues

• Feature: Add global --ca-cert and persist connection options in alias add #188

Does this PR introduce a breaking change?

No.

Other information:

Validated with:

• cargo fmt
• cargo test test_add_alias_persists_connection_options -- --nocapture
• cargo test test_resolve_connection_options_from_alias -- --nocapture
• cargo test test_resolve_connection_options_cli_override -- --nocapture
• cargo test parse_with_alias_defaults -- --nocapture
• cargo test (integration-style tests that require a running ReductStore on localhost:8383 fail with connection errors when the service is not running)