docs(migration): add remote gateway fix runbook for rtx

tasks/openclawd-migration-2026-03/REMOTE-GATEWAY-FIX.md

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+# Remote Gateway Fix (RTX 2080Ti)
+
+## Observed on 2026-03-10
+
+`memory-gateway` health is up, but `memory/status` and `memory/search` fail with:
+
+- `fatal: '/data/memory-repo' does not appear to be a git repository`
+
+This means container-side `GIT_REMOTE_URL=/data/memory-repo` is configured,
+but `/data/memory-repo` is not mounted as a valid Git repo.
+
+## Fix Steps (run on RTX host)
+
+1. Go to project root:
+
+```bash
+cd /home/lingyuzeng/project/qmd-local
+```
+
+2. Ensure memory repo exists and is a git repo:
+
+```bash
+ls -la /home/lingyuzeng/project/qmd-local/qmd-docker-http-mcp/memory-repo/.git
+```
+
+3. Add bind mount in `docker-compose.yml` for `memory-gateway` service:
+
+```yaml
+services:
+  memory-gateway:
+    volumes:
+      - ./data:/data
+      - ./models:/models
+      - ./qmd-docker-http-mcp/memory-repo:/data/memory-repo:ro
+```
+
+4. Ensure `.env` includes:
+
+```bash
+GIT_REMOTE_URL=/data/memory-repo
+```
+
+5. Restart services:
+
+```bash
+docker compose up -d --build qmd memory-gateway
+```
+
+6. Validate:
+
+```bash
+curl -fsS http://127.0.0.1:8787/health
+curl -fsS -X POST http://127.0.0.1:8787/memory/status \
+  -H 'content-type: application/json' \
+  -d '{"branch":"main","require_latest":true}'
+curl -fsS -X POST http://127.0.0.1:8787/memory/search \
+  -H 'content-type: application/json' \
+  -d '{"branch":"main","query":"OpenClaw","query_type":"search","require_latest":true,"n":5}'
+```
+
+## Optional: use Gitea as remote truth source
+
+If you want remote gateway to follow Gitea instead of local path:
+
+- set `GIT_REMOTE_URL=https://gitea.jmsu.top/lingyuzeng/collective-memory-repo.git`
+- configure auth (token/SSH) inside container
+- restart gateway and validate `memory/status` shows indexed-visible.