fix: report dead-task respawns as restarts

[myobie]

Summary

• Report a successful replacement as restarted.
• Use launched only when st2 starts a task without a restart reap.
• Use gc only for final garbage collection without a replacement.
• Keep reap-before-spawn ordering, error behavior, runtime behavior, and public output fields.
• Preserve restarted when a catalog-selected pass absorbs its nested report.
• Use concise ASD-STE100-style comments, test names, and assertion messages.

Taxonomy

• First launch: spawn succeeds without a prior restart reap; report only launched.
• Successful restart: dead-active reap succeeds, then replacement spawn succeeds; report only restarted.
• Final garbage collection: final removal succeeds and no replacement is spawned; report only gc.
• Failed reap: do not spawn that replacement and do not report a restart.
• Failed replacement spawn: the reap can succeed, but do not report a restart.
• Ordering: each dead-active record is reaped before its replacement spawn.

The CLI and eval supervisor continue to print the same public field names. The change separates their values.

Current-main correction

Current main added catalog-selected reporting after the first PR draft. The restack found two proof gaps:

• Selected restart tests still expected launched and gc.
• UpReport::absorb did not copy the new restarted vector.

This head corrects both gaps and proves that selected reconciliation does not act on sibling tasks.

Size

Measure	Before rewrite	Exact current head
PR-local added source	74 lines / 216 words	91 lines / 275 words
Diffstat	+77 / -9	+94 / -17

The increase is the current-main selected-path proof and the required restarted absorb operation. Runtime behavior outside report classification is unchanged.

Current-main integration

• Merged live main ea58cda7d5ffd8a64cf157259425c6bd26549cb4 normally.
• Exact head: ac653955bf2d6830cc9ae84ed415313fa96a2133.
• No force push, deploy, catalog mutation, runtime rollout, or reconcile occurred.

Verification at ac653955bf2d6830cc9ae84ed415313fa96a2133

• cargo test --test run -- --test-threads=1: PASS (27/27)
• cargo test --test native_only -- --test-threads=1: PASS (3/3)
• cargo test --all-targets --all-features -- --test-threads=1: PASS
• Scoped cargo clippy --test run --all-features with warnings denied: PASS
• cargo test --doc --workspace: PASS
• cargo doc --workspace --no-deps: PASS with five unchanged live-main warnings
• git diff --check: PASS
• Hosted Nix: PASS — run 30638466148 / job 91182027806

This PR remains open and unmerged for review.

[myobie]

Exact-head completion receipt for ac653955bf2d6830cc9ae84ed415313fa96a2133: hosted Nix passed in run 30638466148 / job 91182027806. Local focused, full-workspace, scoped Clippy, doctest, documentation, and diff gates are also green. The PR remains open and unmerged for review.