test(sap): add reversible standard text lifecycle

[HappyDevs1]

Why

The existing complex SAP example is deliberately read-only. This adds a similarly long scenario that exercises real writes while deleting the sandbox record before the flow finishes.

SO10 standard texts have a genuine delete operation, making the lifecycle reversible in TS3.

What this adds

• create-revise-delete.flow.yaml: an 88-step create, six-version revise, display, delete, and absence-verification flow
• create-revise-delete.trace.jsonl: the committed live TS3 recording with 93 replay actions

No runner scripts, suite manifests, or cleanup helpers are included.

End-to-end validation

• recorded all 93 actions against TS3 client 100 in 22m31s
• replayed every recorded action successfully with no degraded selectors
• verified each saved version after reopening
• deleted the text and confirmed Display returned not found
• trace preserves ${SO10_TEXT_NAME} and does not contain the resolved sandbox name
• git diff --check passes

Remaining before ready

• run the full workspace fmt, clippy, and test gates when sufficient disk space is available

The PR remains draft for those repository-wide gates.

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