Fix bmo show cycle issues

[erewok]

We aren't clearly declaring what the dependencies are when we show cycles: it was easier to find a cycle by simply recording all the nodes seen along the way and then printing them as a list. However, this is confusing: what are the edges?

This PR attempts to improve the situation by including more information about these cycles and how to repair them.

[Copilot]

Copilot review overview

🟡 Changes recommended

Overlapping-cycle output still omits dependency edges, and the repair hint does not reliably resolve duplicated or multiple cycles.

Review effort: Balanced
Findings: 3 · 1

Open (4)

• Use a HashSet to avoid quadratic duplicate suppression · New
• Make cycle repair hints handle duplicate edges and multiple cycles · New
• Show internal dependency edges for overlapping SCCs · New
• Update documented output to package version 0.9.0 · New

What changed in this PR

Improves cycle diagnostics and relation displays across the CLI and web UI.

Changes:

• Adds SCC-based cycle grouping and remediation hints.
• Normalizes relation views and dependency graph output.
• Adds version flags, bumps to 0.9.0, and expands tests.

File	Description
Cargo.toml	Bumps package version.
Cargo.lock	Updates locked package version.
docs/​commands.md	Documents version flags and graph output.
src/​cli/​issue/​graph.rs	Normalizes and groups blocking relations.
src/​cli/​mod.rs	Adds top-level version flags.
src/​model/​relation.rs	Adds endpoint-relative relation views.
src/​output/​human.rs	Corrects relation rendering direction.
src/​planner/​topo.rs	Adds detailed cycle detection and messages.
src/​web/​handlers.rs	Supplies normalized relations to templates.
src/​web/​templates/​issue.html	Links to the opposite relation endpoint.
tests/​cli.rs	Tests version flag behavior.
tests/​cycle_detection.rs	Tests cycle diagnostics end-to-end.
tests/​graph.rs	Tests graph relation semantics.
tests/​show_relations.rs	Tests CLI relation rendering.
tests/​web.rs	Tests web relation rendering.

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[Copilot]

Copilot review overview

🟡 Changes recommended

The new relation tests can mutate an externally configured database because they inherit BMO_DB.

Review effort: Balanced
Findings: 1

Open (1)

• Clear BMO_DB to keep setup isolated from the real database · New

Resolved since last review (4)

• Show internal dependency edges for overlapping SCCs
• Make cycle repair hints handle duplicate edges and multiple cycles
• Use a HashSet to avoid quadratic duplicate suppression
• Update documented output to package version 0.9.0