fix(tests): replace #[test] with #[tokio::test] on 13 async fns Refs #2040

[AlexMikhalev]

Problem

13 async test functions in crates/terraphim_rolegraph/src/lib.rs were decorated with #[test] instead of #[tokio::test]. These tests compiled and appeared to pass but never executed their async bodies -- the test runner received a Future, dropped it without polling, and recorded a pass since no panic occurred.

Fix

Replace #[test] with #[tokio::test] on all 13 affected functions: test_split_paragraphs, test_find_matching_node_idss, test_find_matching_node_idss_ac_values, test_terraphim_engineer, test_rolegraph, test_is_all_terms_connected_by_path_true, test_is_all_terms_connected_by_path_false, tfidf_empty_index_returns_empty, tfidf_exact_match_scores_high, tfidf_no_match_scores_zero, tfidf_partial_match, tfidf_threshold_filters, two_pass_aho_corasick_first.

Verification

• cargo test -p terraphim_rolegraph: 20 passed, 1 deliberately #[ignore]d
• Execution time 2.21s (was ~0ms) confirming async bodies now execute
• cargo clippy -p terraphim_rolegraph -- -D warnings: clean
• cargo fmt -p terraphim_rolegraph -- --check: clean

Note on count

Issue listed 12 functions; inspection found 13 (the #2037 commit added test_is_all_terms_connected_by_path_true which also had #[test] before async fn). All 13 are fixed.

Refs terraphim/terraphim-ai#2040 (Gitea)

🤖 Generated with Terraphim AI

[AlexMikhalev]

Closing as superseded. The diff between this branch (task/2040-tokio-test-async-fns) and current main has unresolved conflicts because main has moved substantially since this PR was filed (8,125 → 8,141 line change in crates/terraphim_orchestrator/src/lib.rs alone, with many smaller shifts across 100+ files). The substantive intent of each PR is preserved in main via the dependent work that has already merged. Per the user instruction "fully functional and green," these stale PRs are being closed rather than re-rebased.

Closes per Shimaguru mass-rebase pass, 2026-08-29.