fix(skiva-1): spara accept, bildref, lokal träningsbank, lärande-loop-dok

- confirm-loop sparar nu även action=accept som positivt exempel i ai_corrections
- imageS3Key sparas vid image_training-samtycke, annars null
- ai_corrections.proposal lagrar det specifika AI-förslaget per item
- BUILD_TRAINING_SAMPLE bankar lokalt till ai_training_bank (ej externt runTask)
- Jobbet kastar aldrig i AAMOS_MODE=gemini
- Migration 0020: ai_corrections.image_s3_key/proposal + ai_training_bank
- docs/28-lärande-loop.md: datakontrakt, samtycke, retention, GDPR-radering
- Tester: accept + bildref (ja/nej) + lokal bank i gemini-läge
- REQUIRE_REAL=1 är AI-fokuserat i gemini-läge; staging mail/S3 får vara mock

infrastructure/migrations/0020_ai_corrections_training_bank.sql

@@ -0,0 +1,27 @@
+-- Extend ai_corrections with image reference and add a local, versioned training bank.
+-- BUILD_TRAINING_SAMPLE banks here instead of calling external AAMOS/Gemini runTask.
+
+ALTER TABLE ai_corrections
+  ADD COLUMN image_s3_key TEXT,
+  ADD COLUMN proposal JSONB;
+
+CREATE TABLE ai_training_bank (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  correction_id UUID NOT NULL REFERENCES ai_corrections(id) ON DELETE CASCADE,
+  scan_job_id UUID REFERENCES scan_jobs(id) ON DELETE SET NULL,
+  version TEXT NOT NULL DEFAULT 'v1',
+  task_type TEXT NOT NULL,
+  image_s3_key TEXT,
+  proposal JSONB NOT NULL,
+  action TEXT NOT NULL,
+  corrected JSONB,
+  model_version TEXT,
+  prompt_version TEXT,
+  consent_snapshot JSONB NOT NULL DEFAULT '{}',
+  exported_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
+  created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX ai_training_bank_version_idx ON ai_training_bank(version, task_type);
+CREATE INDEX ai_training_bank_scan_job_idx ON ai_training_bank(scan_job_id);
+CREATE INDEX ai_training_bank_created_at_idx ON ai_training_bank(created_at);

infrastructure/migrations/meta/_journal.json

@@ -134,6 +134,13 @@
       "when": 1786141200000,
       "tag": "0019_ai_usage_cost_usd",
       "breakpoints": true
+    },
+    {
+      "idx": 19,
+      "version": "7",
+      "when": 1786144800000,
+      "tag": "0020_ai_corrections_training_bank",
+      "breakpoints": true
     }
   ]
 }