feat(inbound): excludeFromSub hides links without disabling (#6463)

* feat(inbound): excludeFromSub hides links without disabling

Add a per-inbound flag that omits subscription output while keeping the
inbound enabled for Xray, auth, and traffic accounting. Fixes #6435.

* fix(inbound): excludeFromSub review follow-ups

gofumpt model.go, sync docs OpenAPI, keep excludeFromSub master-authored
on node mirror, and exercise the legacy add-column migration path in tests.

* fix(sub): keep excluded inbounds' clients in the usage header

The excludeFromSub filter sat in getInboundsBySubId's SQL, so an excluded
inbound's clients never reached seenEmails in the raw, Clash or JSON
renderer. A client that lives only on a hidden inbound (one client per
inbound sharing a subId) dropped out of the Subscription-Userinfo usage,
quota and expiry and out of the info-node state, while the inbound kept
serving it and counting its traffic.

The query returns every enabled inbound again; each renderer skips an
excluded inbound's links but still counts its clients, the same rule the
Clash renderer already applies to external links it cannot express.

---------

Co-authored-by: mrchatam <mrchatam@users.noreply.github.com>
Co-authored-by: MHSanaei <ho3ein.sanaei@gmail.com>

frontend/src/generated/examples.ts

@@ -796,6 +796,7 @@ export const EXAMPLES: Record<string, unknown> = {
     "disableFlow": false,
     "down": 0,
     "enable": true,
+    "excludeFromSub": false,
     "expiryTime": 0,
     "fallbackParent": null,
     "id": 1,

frontend/src/generated/schemas.ts

@@ -3028,6 +3028,11 @@ export const SCHEMAS: Record<string, unknown> = {
         "example": true,
         "type": "boolean"
       },
+      "excludeFromSub": {
+        "description": "Whether to omit this inbound from subscription output while keeping it operational",
+        "example": false,
+        "type": "boolean"
+      },
       "expiryTime": {
         "description": "Expiration timestamp",
         "format": "int64",
@@ -3151,6 +3156,7 @@ export const SCHEMAS: Record<string, unknown> = {
       "disableFlow",
       "down",
       "enable",
+      "excludeFromSub",
       "expiryTime",
       "id",
       "lastTrafficResetTime",

frontend/src/generated/types.ts

@@ -705,6 +705,7 @@ export interface Inbound {
   disableFlow: boolean;
   down: number;
   enable: boolean;
+  excludeFromSub: boolean;
   expiryTime: number;
   fallbackParent?: FallbackParentInfo | null;
   id: number;

frontend/src/generated/zod.ts

@@ -748,6 +748,7 @@ export const InboundSchema = z.object({
   disableFlow: z.boolean(),
   down: z.number().int(),
   enable: z.boolean(),
+  excludeFromSub: z.boolean(),
   expiryTime: z.number().int(),
   fallbackParent: z.lazy(() => FallbackParentInfoSchema).nullable().optional(),
   id: z.number().int(),