fix(insights): rebuild the recovery page onto the canonical metric structure

The recovery page rendered a grid of compact device-score tiles plus a
redundant cross-link to the recovery-score anatomy at the top. It now
follows the same structure as every other metric page (blood pressure,
pulse, the HealthKit scaffold): each present device-native signal renders
a block carrying a short explainer, the max / median / mean stat strip,
the shared chart with the identical 7 / 30 / 90 / All toggle, and a
per-chart assessment. Multiple charts now carry multiple matching texts.

Register the seven device-native recovery / strain signals (ANS charge,
day / workout strain, cardio load, whole-day average / max heart rate,
energy expenditure) in the generic metric-status registry so each chart
gets a generated assessment, gate them on the recovery module, and give
each its own chart-overlay slot. Drop the duplicate top score-link block
(this surface is reached from the overview already).

Regenerate the OpenAPI contract for the widened metric-status enum.

docs/api/openapi.yaml

@@ -4927,6 +4927,13 @@ paths:
               - STAIR_ASCENT_SPEED
               - STAIR_DESCENT_SPEED
               - BREATHING_DISTURBANCES
+              - ANS_CHARGE
+              - DAY_STRAIN
+              - WORKOUT_STRAIN
+              - CARDIO_LOAD
+              - AVERAGE_HEART_RATE
+              - MAX_HEART_RATE
+              - ENERGY_EXPENDITURE_KJ
             description: "HealthKit metric id to assess (e.g. RESTING_HEART_RATE, SLEEP_DURATION). Closed enum: an unknown id 422s.
               The seven specialised metrics are served by their own routes and are not accepted here."
           required: true