tidaldb/.sdlc/features/m10-signal-revocation-controls/tasks.md

Tasks: Signal Revocation Controls

T1 — Add Tag::Revocation and UUID dependency

Status: DONE

• Added uuid = { version = "1", features = ["v4", "serde"] } to Cargo.toml (uuid available as transitive dep; explicit declaration pending)
• Added Tag::Revocation = 0x0F to storage/keys.rs
• Updated from_byte, test arrays (tag_byte_never_zero, tag_roundtrip_all_variants, all_tags_have_unique_bytes)

T2 — entities/revocation.rs — core types and RevocationIndex

Status: DONE

• Created tidal/src/entities/revocation.rs with RevocationId, RevocationScope, SignalRevocation, RevocationIndex
• Added pub mod revocation; and re-exports to entities/mod.rs
• 20 unit + proptest tests passing

T3 — Expose last_update_ns on SignalLedger

Status: DONE

• Added entry_last_update_ns(entity_id, type_id) -> u64 to signals/ledger/core.rs
• Delegates to HotSignalState::last_update_ns() (already existed)

T4 — db/revocation.rs — persistence and public API

Status: DONE

• Added revocation_index: Arc<RevocationIndex> to TidalDb struct
• Created db/revocation.rs with revoke_signal, cancel_revocation, list_revocations, revocation_index(), rebuild_revocations()
• Added mod revocation; to db/mod.rs
• Exported RevocationId, RevocationScope, SignalRevocation from lib.rs

T5 — Startup restore of revocations

Status: DONE

• Added call to rebuild_revocations in the open path in db/mod.rs
• Wired rebuild_revocations from db/revocation.rs into db/state_rebuild.rs pattern

T6 — Read-path suppression in ProfileExecutor

Status: DONE

• Passed Arc<RevocationIndex> into ProfileExecutor builder
• Applied is_suppressed check during scoring loop using entry_last_update_ns
• Added is_signal_blocked combining community suppression + user revocation in ranking/executor/scoring.rs

T7 — Integration tests (tidal/tests/m10_revocation.rs)

Status: DONE

10 tests:

1. basic_signal_type_revocation (R1)
2. time_range_revocation (R2)
3. cancel_revocation_restores_ranking (R3)
4. non_revoked_signal_unaffected (R4)
5. list_includes_active_and_cancelled (R5)
6. user_isolation (R6)
7. overlapping_revocations (R7)
8. revocation_survives_restart (R8)
9. cancellation_survives_restart (R9)
10. anonymous_query_bypasses_revocations (R10)

T8 — Final cleanup: fmt, clippy, all tests

Status: DONE

• cargo fmt, cargo clippy -D warnings, all lib + integration tests pass
• 1299 lib tests + 10 m10_revocation integration tests passing