feat: add metacognition, reflection, consolidation, narrative and notifications

Phase 10. Metacognition is a cognitive process with deterministic
self-checks (insufficient evidence, single-source reliance, model output
without evidence, repeated failed hypotheses, stale contradictions,
calibration overconfidence); its warnings compete for attention and,
when admitted, add counter-evidence or open an investigation goal.

Reflection reviews the period since the last run (prediction errors,
rejected beliefs, corrections, status changes, completed goals,
contradictions, calibration), turns repeated failures into procedural
lessons written once, and records a reflection event; a model may only
word the prose within the mind's budget.

Consolidation clusters unconsolidated episodes by shared stemmed terms,
creates a belief whose confidence is computed from the episodes as
evidence and a semantic memory linked to each episode by derived_from,
and records jobs with inputs and outputs. Wording may come from the
consolidate prompt within a per-run model budget; the job says which.
Operators can run, pause and reject; originals are never touched.

The narrative hook keeps a five-part first-person narrative built from
state and stored with narrative_updated events. The notification hook
applies explicit thresholded rules, aggregates repeats within a cooldown
and records suppressions with reasons. A scheduled job runs
consolidation and reflection per mind, switching the runtime mode while
it works. API, Background tab, notifications page with unread badge,
overview narrative and warnings, CLI commands, docs/cognition.md.

PLAN.md

@@ -136,8 +136,15 @@ An administrator can: start Noema → log in → create a mind → configure per
 - ☑ API: goals, predictions (create/resolve/calibration), state (get/reset/drive ranges); UI: goals page, prediction dashboard with calibration, cognitive state panel on overview, effective weights on workspace; CLI goal/prediction/state
 - ☑ Docs: predictions.md, motivation.md. Demo scenario 4 (prediction error) verified live
 
-### Phase 10 – Metacognition, reflection, consolidation, narrative, notifications
-- ☐ metacognitive checks and warnings; reflection scheduler; consolidation scheduler with operator controls; narrative generation; notification thresholds, suppression, aggregation, reasons
+### Phase 10 – Metacognition, reflection, consolidation, narrative, notifications ☑
+- ☑ `migrations/0010_cognition`: consolidation_jobs, reflections, narratives, notifications; per-mind settings for schedules and model budgets
+- ☑ `cognition/metacognition`: deterministic self-checks (insufficient evidence, single source, fluent-without-evidence, repeated failure, stale contradiction, overconfidence) competing for attention; admitted warnings discount beliefs or open investigations
+- ☑ `internal/reflection`: computed findings over the period, patterns → procedural lessons, optional model prose, reflection events
+- ☑ `internal/consolidation`: deterministic clustering of episodes, evidence-derived belief + linked semantic memory per cluster, optional model wording within budget, jobs with inputs/outputs, pause, reject
+- ☑ `internal/narrative` + hook: structured five-part narrative rendered deterministically, optional rephrasing
+- ☑ `internal/notifications` + hook: explicit thresholded rules, cooldown aggregation, suppression events, unread badge
+- ☑ Background job: scheduled consolidation and reflection per mind with mode switching; API, UI (Background tab, notifications page, overview narrative and warnings), CLI (narrative, consolidate, reflect, notifications); docs/cognition.md
+- ☑ Demo scenario 3 verified live; tests for notifications, consolidation, reflection
 
 ### Phase 11 – Relationship graph
 - ☐ entities, entity_relationships, extraction from perception, merge/split corrections, interactive explorer (bounded)