feat: grpc-web frontend and deployment stack

[k8ika0s]

Summary

Add grpc-web client integration and deployment support while consolidating maintenance docs.

Changes Made

• Backend: wire transfer/preview services, add provider factory, improve audit log filtering, and require configurable encryption key.
• Frontend: add grpc-web clients, generated stubs, API mapping updates, and auth store synchronization.
• Deployments: add frontend/worker/envoy manifests, containerfiles, ingress, and image overrides.
• Docs: consolidate cleanup/CI/migration summaries into docs/MAINTENANCE_NOTES.md and update references.
• Tooling: add grpc-web generation script and ignore local tools cache.

Files Changed (additions/deletions)

• .gitignore (+4/-1)
• CI_FIXES_SUMMARY.md (+0/-233)
• CI_REMEDIATION_SUMMARY.md (+0/-203)
• CLEANUP_FEATURE_COMPLETE.md (+0/-715)
• CLEANUP_PLAN.md (+0/-97)
• CLEANUP_SUMMARY.md (+0/-248)
• COMPILATION_FIXES.md (+0/-142)
• GIT_WORKFLOW_SETUP.md (+0/-286)
• LICENSE_UPDATE.md (+0/-136)
• LINT_FIX_LESSONS.md (+0/-229)
• MIGRATION_FIX_SUMMARY.md (+0/-260)
• PROJECT_OVERVIEW.md (+0/-239)
• README.md (+3/-3)
• STORAGE_CLEANUP_IMPLEMENTATION.md (+0/-373)
• backend/cmd/server/main.go (+17/-3)
• backend/internal/audit/grpc_handler.go (+43/-9)
• backend/internal/location/provider_factory.go (+45/-0)
• backend/pkg/config/config.go (+7/-0)
• backend/pkg/config/config_test.go (+21/-1)
• deployments/base/deployment.yaml (+5/-0)
• deployments/base/envoy-config.yaml (+81/-0)
• deployments/base/envoy-deployment.yaml (+92/-0)
• deployments/base/envoy-service.yaml (+21/-0)
• deployments/base/frontend-deployment.yaml (+80/-0)
• deployments/base/frontend-service.yaml (+21/-0)
• deployments/base/kustomization.yaml (+12/-0)
• deployments/base/secret.yaml (+3/-0)
• deployments/base/serviceaccount.yaml (+33/-0)
• deployments/base/worker-deployment.yaml (+92/-0)
• deployments/containerfiles/Containerfile.frontend (+34/-0)
• deployments/containerfiles/Containerfile.migrate (+39/-0)
• deployments/containerfiles/Containerfile.server (+83/-0)
• deployments/containerfiles/Containerfile.worker (+38/-0)
• deployments/overlays/dev/kustomization.yaml (+6/-0)
• deployments/overlays/prod/env-overrides.yaml (+15/-0)
• deployments/overlays/prod/ingress.yaml (+41/-0)
• deployments/overlays/prod/kustomization.yaml (+36/-1)
• deployments/overlays/staging/kustomization.yaml (+6/-0)
• docs/BUILT_WITH_BOB.md (+2/-2)
• docs/MAINTENANCE_NOTES.md (+26/-0)
• docs/README.md (+2/-1)
• frontend/.env.example (+6/-2)
• frontend/nginx.conf (+16/-0)
• frontend/package-lock.json (+14/-0)
• frontend/package.json (+4/-2)
• frontend/src/gen/audit/AuditServiceClientPb.ts (+281/-0)
• frontend/src/gen/audit/audit_pb.d.ts (+518/-0)
• frontend/src/gen/audit/audit_pb.js (+4015/-0)
• frontend/src/gen/auth/AuthServiceClientPb.ts (+474/-0)
• frontend/src/gen/auth/auth_pb.d.ts (+756/-0)
• frontend/src/gen/auth/auth_pb.js (+6136/-0)
• frontend/src/gen/cleanup/CleanupServiceClientPb.ts (+603/-0)
• frontend/src/gen/cleanup/cleanup_pb.d.ts (+1228/-0)
• frontend/src/gen/cleanup/cleanup_pb.js (+9905/-0)
• frontend/src/gen/common/common_pb.d.ts (+458/-0)
• frontend/src/gen/common/common_pb.js (+3628/-0)
• frontend/src/gen/location/LocationServiceClientPb.ts (+646/-0)
• frontend/src/gen/location/location_pb.d.ts (+1093/-0)
• frontend/src/gen/location/location_pb.js (+8972/-0)
• frontend/src/gen/preview/PreviewServiceClientPb.ts (+238/-0)
• frontend/src/gen/preview/preview_pb.d.ts (+595/-0)
• frontend/src/gen/preview/preview_pb.js (+4668/-0)
• frontend/src/gen/transfer/TransferServiceClientPb.ts (+539/-0)
• frontend/src/gen/transfer/transfer_pb.d.ts (+998/-0)
• frontend/src/gen/transfer/transfer_pb.js (+8219/-0)
• frontend/src/lib/api.ts (+1419/-34)
• frontend/src/store/authStore.test.ts (+1/-0)
• frontend/src/store/authStore.ts (+6/-0)
• frontend/src/types/index.ts (+1/-0)
• frontend/vite.config.ts (+8/-0)
• go.mod (+3/-3)
• go.sum (+10/-6)
• scripts/generate-grpc-web.sh (+61/-0)

Testing Performed

• make build
• go vet ./...

Breaking Changes

• None

Dependencies Added

• grpc-web (frontend)
• google-protobuf (frontend)

Notes

• Generated grpc-web stubs live in frontend/src/gen (regenerate via scripts/generate-grpc-web.sh).