chore: interne Host-Adresse durch generischen Hostnamen ersetzt

Ersetzt die private LAN-IP des Jetson durch jetson.local in Doku,
Shell-Skripten, .env.example und Docstrings. Funktional betroffen ist
nur ein os.environ.setdefault-Fallback im Spike; gesetzte Env-Vars
(OLLAMA_BASE_URL, GROBID_URL) haben weiterhin Vorrang. uv.lock bleibt
unveraendert (enthaelt Versionsnummern, keine Adressen).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/audit/DATA-QUALITY-2026-06-15.md

@@ -30,7 +30,7 @@ incomplete, or unrepresentative data. This document is that second axis — a
 
 - **Live DB:** Jetson PostgreSQL via an SSH tunnel (open it first):
   ```
-  ssh -f -N -L 5433:localhost:5432 alfred@192.168.178.103
+  ssh -f -N -L 5433:localhost:5432 alfred@jetson.local
   ```
 - **Credentials:** `.env.jetson-ingest` (gitignored) holds `DATABASE_URL`
   (`postgresql://researcher:…@localhost:5433/papers`). The `researcher` role is
@@ -377,7 +377,7 @@ is self-contained so a cold session can pick it up.
   last 2/29.
 - **How:** no new code — ingest already merges + dedups `api_citations +
   pdf_citations` ([codex/ingest.py:288](../../codex/ingest.py)). GROBID server is
-  already configured (`GROBID_URL=http://192.168.178.103:8070` in
+  already configured (`GROBID_URL=http://jetson.local:8070` in
   `.env.jetson-ingest`). Download free arXiv PDFs, re-ingest with `source_path`.
 - **Acceptance:** the 2 theses gain references; published papers gain
   GROBID-parsed refs beyond OpenAlex/S2 coverage; citing coverage 27/29 → 29/29.