Fix dashboard duplicate status copy

[yvette-carlisle]

Summary

• collapse duplicated reason/cause text in operator dashboard attention cards
• use lowercase sentence-style reason values for app-server and attention causes
• suppress repeated wait/history/closeout facts in adjacent dashboard rows

Verification

• cargo test -p decodex operator_dashboard --all-features
• cargo make fmt-check
• cargo +nightly fmt --all -- --check
• git diff --check
• browser mock dashboard smoke at http://127.0.0.1:57405/dashboard