fix(admin): align heal commands with RustFS API

[overtrue]

Related Issue

Resolves rustfs/rustfs#2538

Background

rc admin heal start was calling /rustfs/admin/v3/heal/start with the CLI request shape. RustFS expects the admin heal route to be /rustfs/admin/v3/heal/ or /rustfs/admin/v3/heal/{bucket} with the server HealOpts JSON body. The mismatch caused RustFS to return an XML InvalidRequest response, which rc surfaced as Invalid path.

Solution

• Translate heal start requests to the RustFS admin heal route and required HealOpts JSON shape.
• Send heal stop through the same route with forceStop=true and a valid body.
• Route heal status to the RustFS background-heal status endpoint.
• Avoid printing an empty status block when the server returns success without status details.
• Report admin 400 Bad Request responses as bad requests instead of path parsing failures.

Tests

• cargo fmt --all --check
• cargo clippy --workspace -- -D warnings
• cargo test --workspace
• Manual verification against a local RustFS server: rc admin heal start local, rc admin heal start local --json, and rc admin heal status local --json

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Enable recursive mode for root heal starts

When rc admin heal start <alias> is invoked without --bucket/--prefix, rustfs_heal_path() targets /heal/, but this conversion always sends recursive: false. On RustFS/MinIO-style heal APIs, non-recursive root heal requests are treated as status/no-op flows rather than a full namespace heal, so the command can report success without actually starting a heal run. Set recursive based on request scope (at least for the root /heal/ case) to preserve the documented “all buckets” behavior.

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