chore: reorganize docs, document migrations, gitignore operational files for v1.0.0 release

.gitignore

@@ -39,10 +39,6 @@ frontend.pid
 backend/uploads/temp/
 feature_request*.md
 
-# Planning docs
-docs/aeo-compliance-ui-plan.md
-docs/aeo-compliance-wireframe.md
-
 # AI tooling config
 .claude/
 ai_notes.md
@@ -59,28 +55,20 @@ backend/setup.js-backup
 # Kiro agents (local only)
 .kiro/agents/
 
-# Kiro implementation summary (internal only)
-docs/kiro-implementation-summary.md
-
-# Diagnostic scripts (troubleshooting only)
-backend/scripts/drift-check.js
-backend/scripts/bu-reassignment-check.js
-backend/scripts/export-reassigned-findings.js
-
-# Investigation exports
-docs/reassigned-findings-*.xlsx
-
 # Zip files
 *.zip
 
-# Docs — local/staging files
-docs/card-lookup-results.csv
-docs/card-prod-archer-firewall-request.md
-docs/granite-reassignment-upload.csv
-docs/granite-reassignment-upload.xlsx
-
 # Production DB copies
 cve_database_prod.db
 cve_database.db.prod
 cve_database.db.backup
 database.db
+
+# Operations — local admin records, UAT logs, firewall requests, data exports
+docs/operations/
+
+# Data exports — local spreadsheets
+docs/data-exports/
+
+# Python cache
+__pycache__/