Record generation attempts and retry delays

docs/internal/generation.md

@@ -22,6 +22,14 @@ FIFO permit. Preparation failures dispatch nothing. When a positive retry
 budget ends with eligible failures, the internal exhaustion error retains the
 final cause and actual dispatched-attempt count.
 
+When an invocation-local [observation recorder](observation.md) is present in
+the context, each acquisition emits an attempt event, including canceled
+capacity waits without dispatch. Each actual retry wait emits a delay event,
+including interrupted waits. Active permits are released before callbacks;
+generation duration ends before callback delivery. Built-in successful-envelope
+usage retains reported-field presence, while injected clients use explicit
+presence when supplied and otherwise treat zero fields as unknown.
+
 Focused coordinator tests use controlled transport and wait functions. They
 cover eligibility, exhaustion, cancellation, backoff, request freezing, permit
 release, and the injected-client path. The capacity manager tests own permit

docs/internal/observation.md

@@ -4,8 +4,9 @@
 aggregation, measured phase totals, and synchronous metadata event delivery.
 Its event values and callback type live in `internal/domain` so internal
 requests can carry them without depending on the recorder package. The
-recorder currently supplies run IDs to the runner; attempt and lifecycle
-instrumentation is added at their owning boundaries.
+recorder currently supplies run IDs to the runner and receives attempt and
+retry-delay measurements from the generation coordinator. Run lifecycle
+instrumentation is added at the runner boundary.
 
 A recorder keeps only counters, resolved identity fields, and the selected
 callback. It has no global history, queue, goroutine, or mutex held across a
@@ -28,4 +29,5 @@ attempt events.
 The [recorder tests](../../internal/observation/recorder_test.go) own usage
 presence, phase sums, event ordering, empty-run accounting, identity snapshots,
 and callback panic behavior. The [generation coordinator](generation.md) owns
-attempt and retry-delay measurements once connected to this recorder.
+attempt and retry-delay measurements and emits their completion events after
+releasing active permits.

docs/roadmap/implementation.md

@@ -360,6 +360,8 @@ wiring in this stage. Update the internal inventory when the package lands.
 
 ## Stage 7 — Instrument Attempts And Retry Delays
 
+**Completed:** 2026-09-23.
+
 Connect the coordinator to the internal recorder through context. Record measured
 capacity wait even on interrupted acquisition, actual dispatch and outcome, usage
 from Stage 3, and completed/canceled backoff. Release the active permit before