Initial commit: RIPE CIDR/FQDN collector

Collector daemon, FastAPI server (addresses, diff, collect, sources),
SQLite storage with change journal, Docker Compose deployment,
tests, documentation and project rules.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Dockerfile.test

@@ -0,0 +1,10 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt requirements-dev.txt ./
+RUN pip install --no-cache-dir -r requirements.txt -r requirements-dev.txt
+
+COPY . .
+
+CMD ["pytest", "-q"]