Render Cloud query errors and add organization context

[sdairs]

Summary

• Render documented Query API envelopes as SQL error <code>: <details>.
• Preserve HTTP status and raw response bodies for malformed, non-JSON, and alternate Query API errors.
• Add organization scope to bare NOT_FOUND errors while preserving detailed resource errors and existing error kinds/exit codes.

Tests

• cargo test -p clickhouse-cloud-api --test run_query_test
• cargo test -p clickhousectl -p clickhouse-cloud-api
• cargo clippy -p clickhousectl -p clickhouse-cloud-api --all-targets -- -D warnings
• cargo fmt --all --check

Closes #334

[Copilot]

Pull request overview

This PR improves ClickHouse Cloud error rendering in both the clickhousectl CLI and the underlying clickhouse-cloud-api library, addressing issue #334 by making Query API failures human-readable and by adding missing organization context to otherwise ambiguous NOT_FOUND errors.

Changes:

• Format documented Query API SQL error envelopes as SQL error <code>: <details> while preserving HTTP status + raw body for malformed/non-JSON responses.
• Add organization request-scope context to bare NOT_FOUND API errors without changing existing error kinds/exit codes.
• Add regression tests in both the API crate and the CLI crate to pin the new error formatting behavior.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
crates/clickhousectl/tests/cli_request_shape_test.rs	Adds CLI-level regression tests for org-scoped NOT_FOUND and Query API error formatting.
crates/clickhousectl/src/cloud/service_query.rs	Ensures org-scoped error conversion is used during query endpoint binding.
crates/clickhousectl/src/cloud/postgres.rs	Routes Postgres cloud endpoint errors through org-aware error conversion.
crates/clickhousectl/src/cloud/client.rs	Introduces org-aware error conversion (convert_error_for_organization) and wires it through org-scoped CloudClient calls.
crates/clickhouse-cloud-api/tests/run_query_test.rs	Updates/adds API-level tests to assert new Query API error message formatting and status preservation.
crates/clickhouse-cloud-api/src/client.rs	Implements query_api_error_message() and uses it to consistently format Query API errors (including 206 cases).

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