Add atomic Resource demand observations

INVARIANTS.md

@@ -34,4 +34,5 @@ materialization, messaging, DING, or presence must preserve them.
 | **Parked tasks are visible and individually recoverable** | A parked task is reported alongside an unmodified runtime observation as a complete known fault; only an unbelievable marker fails closed. Park markers and unpark requests share the exact canonical catalog-folder plus host ownership scope, and the projected recovery argv carries both axes, so same-host supervisors cannot see, delete, consume, or advertise recovery into each other's channels even for the same task ID. A projected park whose supervisor generation is gone is positively not parked. An explicit per-task unpark clears that task's park and spent budget so it is launchable again and stays recovered past `interval`, releases no other parked task, restarts no healthy peer, and restores the agent's derived DING. | `src/flapping.rs::unpark_restores_a_launchable_task_not_just_a_cleared_flag`; `src/flapping.rs::unpark_is_per_task_and_reports_whether_it_changed_anything`; `src/park.rs::same_host_supervisors_isolate_markers_and_requests_by_catalog`; `src/park.rs::a_marker_from_a_dead_supervisor_reads_as_not_parked`; `src/park.rs::published_parks_are_readable_and_clear_when_the_task_recovers`; `src/park.rs::an_unbelievable_marker_is_indeterminate_not_absent`; `src/park.rs::a_request_is_consumed_exactly_once`; `src/task_inventory.rs::a_parked_task_reports_its_fault_alongside_a_truthful_runtime_state`; `src/task_inventory.rs::an_unbelievable_park_marker_makes_the_envelope_incomplete`; `tests/task_inventory_cli.rs::projected_recovery_targets_its_exact_catalog_and_host_despite_ambient_defaults`; `tests/run.rs::an_operator_recovers_one_parked_task_without_disturbing_a_healthy_peer`; `tests/run.rs::an_unpark_request_for_a_task_that_is_not_parked_says_so` |
 | **Tracked workspaces fail closed** | Materialization simulates content operations before writing and refuses a real change to any Git-tracked target. Byte-identical tracked, untracked, and non-Git targets retain useful behavior. | `tests/materialize.rs::every_content_directive_refuses_to_change_a_tracked_target_before_any_write`; `tests/materialize.rs::byte_identical_tracked_target_is_allowed_without_modification`; `tests/materialize.rs::untracked_and_non_git_targets_remain_materializable` |
 | **Native flat root** | Without an authored override, catalog tasks, eval messaging, shell helpers, and DING all use the catalog itself as `ST_ROOT`; no nested bus directory is synthesized. | `src/eval_run.rs::bus_root_expands_st_root_else_defaults`; `tests/eval_run_e2e.rs::st2_eval_runs_a_benign_folder_to_a_pass_verdict`; `tests/pty.rs` |
+| **Resource observation is state-first, atomic, and fenced** | ABI-3 periodic publication and demanded `Published` results reuse one bounded `Publication` payload and one host acceptance, digest, relevance, typed-fact, and catch-up core; the host never trusts a runtime digest or observation timestamp. Demand reaches only a resident runtime that explicitly declares `capability "demand"`. Every `Observe` carries a positive watermark and the exact owner, binding, and registration, and exactly one matching `Unchanged`, `Failed`, or `Published` atomic result closes it. One outstanding dispatch plus one latest trailing watermark coalesces bursts without losing in-flight arrivals. Backpressure retains queued demand, replacement fences stale output, restart and provider failure settle honestly, and client disconnect or wait expiry never cancels accepted work. | `tests/resource_profile_supervisor_e2e.rs::demand_observation_settlement_matrix_is_atomic_and_preserves_facts`; `tests/resource_profile_supervisor_e2e.rs::demand_observation_coalesces_and_fences_watermarks`; `tests/resource_profile_supervisor_e2e.rs::demand_observation_survives_restart_disconnect_and_denies_missing_capability`; `tests/resource_profile_supervisor_e2e.rs::observable_publication_reaches_builtin_resync_with_filter_catch_up_and_scope_isolation`; `tests/agent_resource.rs::refresh_cli_reports_exact_receipts_and_wait_expiry_keeps_the_request`; `src/resource_observe.rs::tests::receipt_evidence_shape_matches_atomic_results` |
 | **Proof references resolve** | Every qualified test named in this table exists in its named source file, so stale invariant claims fail the suite instead of silently surviving a refactor. | `tests/invariants.rs::qualified_proof_references_resolve` |