Add project handoff and NAS remote switch marker

GIT_REMOTE_SWITCH_TO_NAS_2026-03-31.md

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+# Git Remote Switch Marker
+
+Date: 2026-03-31 13:34:17 CST
+Repository: `/root/sourceserver/pbf`
+
+## Remote Change
+
+The repository remote was switched to the NAS Git server:
+
+- host: `192.168.1.230`
+- port: `2222`
+- remote: `ssh://git@192.168.1.230:2222/tei/pbf.git`
+
+## Result
+
+`origin` now points to:
+
+- fetch: `ssh://git@192.168.1.230:2222/tei/pbf.git`
+- push: `ssh://git@192.168.1.230:2222/tei/pbf.git`
+
+Remote visibility check completed successfully against:
+
+- `refs/heads/main`
+
+## Note
+
+This file exists as an explicit repository marker that the Git server for `pbf` was switched to the NAS-hosted remote on 2026-03-31.