Remove AllowMeterOverage and CanShowBillingIssueBanner

[BrewingCoder]

Parent: #25 — Remove all SaaS billing code

What to Remove

Workspace struct

Field	Line
AllowMeterOverage	300 (defaults to true)

AllWorkspaceSettings struct

Field	Line
CanShowBillingIssueBanner	484 (defaults to false)

Callers

AllowMeterOverage

File	Line	Usage
private-graph/graph/resolver.go	497	Field mapping
private-graph/graph/schema.resolvers.go	3788-3795	UpdateAllowMeterOverage mutation
private-graph/graph/schema.graphqls	3128	GraphQL mutation definition
private-graph/graph/generated/generated.go	970, 6849-6859, 11703-11707	Generated resolvers

CanShowBillingIssueBanner

File	Line	Usage
model/model.go	2454	Set to false in EnableAllWorkspaceSettings
No other active readers — effectively dead code

Migration Required

• Drop allow_meter_overage from workspaces
• Drop can_show_billing_issue_banner from all_workspace_settings

Test Plan

• Remove fields
• Remove UpdateAllowMeterOverage mutation from GraphQL schema
• Regenerate GraphQL code
• Add column-drop migrations
• Verify build + tests

🤖 Generated with Claude Code

[github-actions]

AI Triage: Remove SaaS billing-related fields (AllowMeterOverage, CanShowBillingIssueBanner) and their associated GraphQL mutations as part of removing all SaaS billing code.

Labels applied: area:backend, tech-debt, component:database, billing-removal, priority:medium, component:graphql