fix(webapp): remove unused Electric sync trace routes

.server-changes/remove-unused-trace-sync-route.md

@@ -0,0 +1,6 @@
+---
+area: webapp
+type: fix
+---
+
+Removed an unused internal dashboard sync route that is no longer part of any product surface.

apps/webapp/app/v3/electricShape.server.ts

@@ -1,47 +1,3 @@
-import { z } from "zod";
-
-/**
- * OTel trace IDs are 32 lowercase hex chars. The traceparent parser only
- * checks the dash-delimited format, so crafted ids can be persisted and later
- * interpolated into shape `where` clauses. Validate here to close the SQLi vector.
- */
-export const OtelTraceIdSchema = z
-  .string()
-  .regex(/^[0-9a-f]{32}$/, "traceId must be 32 lowercase hex characters");
-
-/** Params the sync routes set themselves; stripped from incoming requests. */
-export const RESERVED_ELECTRIC_SHAPE_PARAMS = new Set(["where", "table", "columns"]);
-
-const CUID_LIKE = /^[a-z][a-z0-9_]*$/i;
-
-/**
- * Tenant column a trace shape is scoped by. TaskEvent scopes by non-null
- * organizationId; TaskRun scopes by non-null projectId (its organizationId is
- * nullable). The column is from this fixed union, never user input, so it's
- * safe to interpolate.
- */
-export type TraceScope =
-  | { column: "organizationId"; id: string }
-  | { column: "projectId"; id: string };
-
-/**
- * Build the Electric Shape `where` clause for the trace sync routes. Both ids
- * are re-validated as defense-in-depth so a missed call site can't bypass scope.
- */
-export function buildElectricTraceWhereClause(args: {
-  traceId: string;
-  scope: TraceScope;
-}): string {
-  const { traceId, scope } = args;
-  if (!OtelTraceIdSchema.safeParse(traceId).success) {
-    throw new Error("buildElectricTraceWhereClause: unsafe traceId");
-  }
-  if (!CUID_LIKE.test(scope.id)) {
-    throw new Error("buildElectricTraceWhereClause: unsafe scope id");
-  }
-  return `"traceId"='${traceId}' AND "${scope.column}"='${scope.id}'`;
-}
-
 /**
  * Characters rejected in realtime tag values — the single source of truth
  * shared by the apiBuilder Zod refine (`realtime.v1.runs.ts`) and the runtime