feat: add fluxer upstream source and self-hosting documentation

- Clone of github.com/fluxerapp/fluxer (official upstream)
- SELF_HOSTING.md: full VM rebuild procedure, architecture overview,
  service reference, step-by-step setup, troubleshooting, seattle reference
- dev/.env.example: all env vars with secrets redacted and generation instructions
- dev/livekit.yaml: LiveKit config template with placeholder keys
- fluxer-seattle/: existing seattle deployment setup scripts

fluxer/packages/queue/src/api/QueueRequestSchemas.tsx

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {JsonValueSchema} from '@fluxer/queue/src/types/JsonTypes';
+import {z} from 'zod';
+
+export const EnqueueRequestSchema = z.object({
+	task_type: z.string().min(1).max(256),
+	payload: JsonValueSchema,
+	priority: z.number().int().min(0).max(100).default(0),
+	run_at: z.iso.datetime().optional(),
+	max_attempts: z.number().int().min(1).max(100).default(3),
+	deduplication_id: z.string().max(256).optional(),
+});
+
+export type EnqueueRequest = z.infer<typeof EnqueueRequestSchema>;
+
+export const DequeueQuerySchema = z.object({
+	task_types: z.string().optional(),
+	limit: z.coerce.number().int().min(1).max(100).default(1),
+	wait_time_ms: z.coerce.number().int().min(0).max(30000).default(0),
+	visibility_timeout_ms: z.coerce.number().int().min(1000).max(43200000).optional(),
+});
+
+export type DequeueQuery = z.infer<typeof DequeueQuerySchema>;
+
+export const AckRequestSchema = z.object({
+	receipt: z.string().uuid(),
+});
+
+export type AckRequest = z.infer<typeof AckRequestSchema>;
+
+export const NackRequestSchema = z.object({
+	receipt: z.string().uuid(),
+	error: z.string().max(4096).optional(),
+});
+
+export type NackRequest = z.infer<typeof NackRequestSchema>;
+
+export const VisibilityRequestSchema = z.object({
+	receipt: z.string().uuid(),
+	timeout_ms: z.number().int().min(1000).max(43200000),
+});
+
+export type VisibilityRequest = z.infer<typeof VisibilityRequestSchema>;
+
+export const UpsertCronRequestSchema = z.object({
+	id: z.string().min(1).max(256),
+	task_type: z.string().min(1).max(256),
+	payload: JsonValueSchema,
+	cron_expression: z.string().min(1).max(256),
+	enabled: z.boolean().default(true),
+});
+
+export type UpsertCronRequest = z.infer<typeof UpsertCronRequestSchema>;
+
+export const RetryJobParamsSchema = z.object({
+	job_id: z.string().uuid(),
+});
+
+export type RetryJobParams = z.infer<typeof RetryJobParamsSchema>;
+
+export const DeleteJobParamsSchema = z.object({
+	job_id: z.string().uuid(),
+});
+
+export type DeleteJobParams = z.infer<typeof DeleteJobParamsSchema>;