feat(capability): persist model qualification observations

database/migrations/045_capability_model_qualification_observations.sql

@@ -0,0 +1,24 @@
+BEGIN;
+
+SET ROLE capability_role;
+
+CREATE TABLE IF NOT EXISTS capability.cognitive_model_qualification_observations (
+  observation_id TEXT PRIMARY KEY,
+  provider_instance_id TEXT NOT NULL,
+  provider_model_id TEXT NOT NULL,
+  status TEXT NOT NULL CHECK (status IN ('REACHABLE','RESPONDED_WITHOUT_QUALIFICATION','UNAVAILABLE')),
+  finish_reason TEXT NOT NULL,
+  latency_millis BIGINT NOT NULL CHECK (latency_millis >= 0),
+  output_observed BOOLEAN NOT NULL,
+  quality_assessed BOOLEAN NOT NULL DEFAULT FALSE CHECK (quality_assessed = FALSE),
+  category TEXT NOT NULL CHECK (category = 'UNRATED'),
+  observed_at_unix_millis BIGINT NOT NULL CHECK (observed_at_unix_millis > 0)
+);
+
+CREATE INDEX IF NOT EXISTS cognitive_model_qualification_lookup
+  ON capability.cognitive_model_qualification_observations(provider_instance_id, provider_model_id, observed_at_unix_millis DESC);
+
+GRANT SELECT, INSERT ON capability.cognitive_model_qualification_observations TO capability_role;
+
+RESET ROLE;
+COMMIT;