fix(headless): preserve local data in exports and sleep queries

[1072302482]

This fixes #68: CLI GPX exports use the default summary payload, which omits the route, so a workout with recorded GPS is incorrectly reported as having no GPS data.

Additional, independently reproduced data omissions are included: the default type list contains daily, CSV consumes a summary payload, and several supported types never enter the corresponding core queries. This also fixes CSV device provenance, workout samples after local midnight, and weight records that contradict the workout scope's exclusion metadata.

• Correct the default type name and reject invalid export arguments before opening the database or touching output; retain JSON usage errors and the existing exit-code contract.
• Use full payloads for CSV/GPX/FIT while preserving JSON's summary default and CSV's column layout. Device values remain anonymized.
• Complete the core's type-query guards and enforce the existing workout time/scope boundaries.
• Load the full latest sleep detail for MCP, including its recorded stage timeline.

Regression tests exercise the shared export builder and real CLI subprocesses with synthetic SQLite libraries, including GPX/FIT output, unchanged source databases, unchanged existing output on usage errors, and complete/missing sleep stages.

No schema, dependency, normalizer, sync, desktop UI, or repository documentation changes.

Validation on Windows with Rust 1.98.1 and the existing lockfile:

• cargo fmt --manifest-path src-tauri/Cargo.toml --all -- --check
• cargo check --manifest-path src-tauri/Cargo.toml --workspace --locked --offline --all-targets
• cargo clippy --manifest-path src-tauri/Cargo.toml --workspace --locked --offline --all-targets -- -D warnings
• cargo test --manifest-path src-tauri/Cargo.toml --workspace --locked --offline: 383 passed, 0 failed; 1 existing real-old-database fixture test remains ignored.

GitHub CI, Linux/macOS execution, and the unchanged frontend build/tests have not been run locally.

Fixes #68.