Collapse Docker pull progress in non-TTY output

[sdairs]

Closes #353

Summary

• collapse Docker image pull events into one image-level success or failure line for non-TTY, JSON, agent, and CI output
• retain detailed layer IDs and byte progress for interactive terminals
• preserve Docker diagnostics and exit status on pull failures

Tests

• cargo fmt --all
• cargo test -p clickhousectl local::docker::tests
• cargo test -p clickhousectl --test local_docker_pull_progress_test
• cargo test -p clickhousectl
• cargo clippy -p clickhousectl --all-targets -- -D warnings

[Copilot]

Pull request overview

This PR improves clickhousectl’s local Postgres Docker image pull reporting by collapsing noisy per-layer progress events into a single bounded summary line when output is non-interactive (non-TTY, JSON/agent/CI), while preserving detailed per-layer context for interactive terminals. This aligns local-command UX with the expectations in issue #353 and keeps Docker failure diagnostics intact.

Changes:

• Add a PullReporter and progress-mode selection to switch between interactive (detailed) and collapsed (single-line) pull reporting.
• Route local Postgres install/start image pulls through the new docker::pull_image(..., structured_output) behavior (removing ad-hoc eprintln! callers).
• Add subprocess + unit tests validating collapsed non-TTY output and failure/diagnostic preservation.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
crates/clickhousectl/src/local/docker.rs	Introduces interactive vs collapsed pull progress reporting and updates pull_image to emit bounded non-TTY output while keeping interactive detail.
crates/clickhousectl/src/local/mod.rs	Updates local Postgres install path to use the new pull_image(..., json) behavior instead of printing progress in the caller.
crates/clickhousectl/src/local/postgres.rs	Updates local Postgres start path to use the new pull_image(..., json) behavior when the image is missing.
crates/clickhousectl/tests/local_docker_pull_progress_test.rs	Adds subprocess coverage using a fake Docker socket to assert collapsed non-TTY output and preserved diagnostics on pull failure.

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