feat: add docker build/compose output filter

[bug-ops]

Parent: #717

Problem

docker build and docker compose build produce hundreds of lines of layer progress that waste context tokens.

Acceptance Criteria

• Match docker build, docker compose build, docker compose up
• Strip layer download/extract progress lines (Downloading, Extracting, Pulling fs layer, etc.)
• Strip docker compose pull/create progress
• Preserve error output, final image ID, and warnings
• Preserve docker compose ps service status
• Config: [tools.filters.docker] with enabled flag
• Tests with realistic output samples
• Expected savings: 80-95%

[bug-ops]

Resolved by PR #734: migrated to declarative TOML filter engine with built-in rule in default-filters.toml.