fix(api,lib): consent before reuse, tighter inputs and caches that tell on themselves

Per-status texts check AI consent before the unchanged-data refresh can
re-stamp them, the comprehensive fingerprint folds in the comparison
baseline and generation language so toggling either regenerates once,
and profile, threshold and source-priority writes evict the analytics,
targets and derived caches they feed. CSV export neutralises spreadsheet
formula prefixes on free-text cells while numeric columns stay typed,
the derived batch validates its type token against the measurement enum
and carries a per-user rate limit, and a dose synced from the phone app
counts as the interactive write it is. Background cache refresh
failures log a structured event instead of vanishing, the warm queue
runs visit-triggered jobs alongside the nightly walk, the formatter
memo evicts one entry instead of flushing wholesale with its option
objects frozen, the targets cold build bounds its fan-out, and time in
bed unions every writer's envelope while stages stay with the richest
recorder.

docs/api/openapi.yaml

@@ -4224,11 +4224,11 @@ paths:
             maxLength: 1024
             description: Comma-separated derived-metric tokens. Each is a `<DERIVED_METRIC_ID>` or
               `<DERIVED_METRIC_ID>:<MeasurementType>` (the colon sub-targets a VITALS_BASELINE vital). An unknown id
-              422s; at most 24 tokens; duplicates collapse.
+              422s; a `type` outside the MeasurementType enum 422s; at most 24 tokens; duplicates collapse.
           required: true
           description: Comma-separated derived-metric tokens. Each is a `<DERIVED_METRIC_ID>` or
             `<DERIVED_METRIC_ID>:<MeasurementType>` (the colon sub-targets a VITALS_BASELINE vital). An unknown id 422s;
-            at most 24 tokens; duplicates collapse.
+            a `type` outside the MeasurementType enum 422s; at most 24 tokens; duplicates collapse.
       responses:
         "200":
           description: The map of derived-metric values, keyed by token.