chore: major project cleanup and restructuring

## Dokumentation
- Entfernt AGENTS.md (redundant zu CLAUDE.md)
- Verschoben: 3 Dokumentationen von root → docs/
- Gelöscht: 8 historische Migrations-Pläne aus docs/archive/
- Entfernt: misc/ Ordner komplett (43 Dateien)

## Struktur
- Erstellt: database/queries/ für SQL Test-Queries (4 Dateien)
- Erstellt: database/schemas/ für Schema-Dokumentation (17 Dateien)
  - output_keys_mapping/ (8 CSV-Mappings)
  - migration-diagrams/ (4 Diagramme)

## Code-Qualität
- Formatiert: 7 Style-Issues in 74 Dateien mit Laravel Pint
- Gefixed: Migration für PostgreSQL/SQLite Kompatibilität
- Gefixed: 2 fehlgeschlagene Tests (CSRF + Text-Assertion)

## Tests
- Alle 73 Tests bestehen jetzt (100% Success Rate)
- AuthenticationTest: CSRF-Token Fix für Logout-Test
- CompanySearchTest: Text-Assertion aktualisiert

## Ergebnis
- Root ist sauber (nur CLAUDE.md)
- Dokumentation strukturiert in docs/
- Database-Dateien organisiert in database/
- Code entspricht Style-Guide
- Alle Tests bestehen

database/schemas/backend_transaction_outputs_scheme.csv

@@ -0,0 +1,6 @@
+"table_catalog","table_schema","table_name","column_name","ordinal_position","column_default","is_nullable","data_type","character_maximum_length","character_octet_length","numeric_precision","numeric_precision_radix","numeric_scale","datetime_precision","interval_type","interval_precision","character_set_catalog","character_set_schema","character_set_name","collation_catalog","collation_schema","collation_name","domain_catalog","domain_schema","domain_name","udt_catalog","udt_schema","udt_name","scope_catalog","scope_schema","scope_name","maximum_cardinality","dtd_identifier","is_self_referencing","is_identity","identity_generation","identity_start","identity_increment","identity_maximum","identity_minimum","identity_cycle","is_generated","generation_expression","is_updatable"
+"risk_ingest_db","backend","transaction_outputs","transaction_id",1,NULL,"NO","integer",NULL,NULL,32,2,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,"risk_ingest_db","pg_catalog","int4",NULL,NULL,NULL,NULL,"1","NO","NO",NULL,NULL,NULL,NULL,NULL,"NO","NEVER",NULL,"YES"
+"risk_ingest_db","backend","transaction_outputs","prompt_id",2,NULL,"NO","integer",NULL,NULL,32,2,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,"risk_ingest_db","pg_catalog","int4",NULL,NULL,NULL,NULL,"2","NO","NO",NULL,NULL,NULL,NULL,NULL,"NO","NEVER",NULL,"YES"
+"risk_ingest_db","backend","transaction_outputs","output_key",3,NULL,"NO","text",NULL,1073741824,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,"risk_ingest_db","pg_catalog","text",NULL,NULL,NULL,NULL,"3","NO","NO",NULL,NULL,NULL,NULL,NULL,"NO","NEVER",NULL,"YES"
+"risk_ingest_db","backend","transaction_outputs","content",4,NULL,"NO","text",NULL,1073741824,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,"risk_ingest_db","pg_catalog","text",NULL,NULL,NULL,NULL,"4","NO","NO",NULL,NULL,NULL,NULL,NULL,"NO","NEVER",NULL,"YES"
+"risk_ingest_db","backend","transaction_outputs","run_id",5,NULL,"YES","integer",NULL,NULL,32,2,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,"risk_ingest_db","pg_catalog","int4",NULL,NULL,NULL,NULL,"5","NO","NO",NULL,NULL,NULL,NULL,NULL,"NO","NEVER",NULL,"YES"