chore: 初始化 eightbf-analysis-go（对齐 Java 会商作业服务）

Go 实现 /api/v1/analysis 契约、Demo/Live Worker、DeerFlow SSE；含设计文档与冒烟脚本。

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/smoke-demo.sh

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+#!/usr/bin/env bash
+# 对本机已启动的 Go 服务做 demo 冒烟（默认 :18097）。
+# 注意：勿与 Java 实例同时抢同一库的 queued。
+set -euo pipefail
+BASE="${BASE:-http://127.0.0.1:18097/api/v1/analysis}"
+echo "== health =="
+curl -sS "$BASE/health" | tee /tmp/eba-smoke-health.json
+echo
+CREATE=$(curl -sS -X POST "$BASE/jobs" -H 'Content-Type: application/json' \
+  -d '{"taskId":"smoke-'"$(date +%s)"'","title":"smoke","manualIntervention":true,"agents":[{"id":"a1","name":"甲"},{"id":"a2","name":"乙"}]}')
+JOB=$(echo "$CREATE" | python3 -c 'import sys,json;print(json.load(sys.stdin)["data"]["id"])')
+echo "job=$JOB"
+for i in $(seq 1 40); do
+  J=$(curl -sS "$BASE/jobs/$JOB")
+  ST=$(echo "$J" | python3 -c 'import sys,json;print(json.load(sys.stdin)["data"]["status"])')
+  PCT=$(echo "$J" | python3 -c 'import sys,json;print(json.load(sys.stdin)["data"].get("progress",{}).get("percent",0))')
+  echo "tick=$i status=$ST percent=$PCT"
+  [ "$ST" = "done" ] && break
+  sleep 0.5
+done
+echo OK