Add Python client library for Neo4j aircraft data with architecture documentation

[Copilot]

Implements a type-safe Python client for querying aircraft operational data in Neo4j with comprehensive architecture documentation including Mermaid diagrams.

Core Library

Package: neo4j_client/ (1,140+ LOC)

• 9 Pydantic models with full type hints covering domain entities (Aircraft, Flight, System, MaintenanceEvent, etc.)
• 5 repository classes implementing query operations using repository pattern
• Connection manager with context manager support for session lifecycle
• Exception hierarchy for typed error handling

All Cypher queries use parameterization to prevent injection attacks.

Architecture Documentation

ARCHITECTURE.md includes 6 Mermaid diagrams:

• Layered architecture and component interactions
• Read/write operation flows (sequence diagrams)
• Repository pattern structure (class diagram)
• Security validation layers
• Connection state machine
• Testing infrastructure

Testing

15 integration tests using pytest + testcontainers for real Neo4j instances. Session-scoped container with function-scoped cleanup.

Usage

from neo4j_client import Neo4jConnection, AircraftRepository, FlightRepository

with Neo4jConnection(uri, user, password) as conn:
    session = conn.get_session()
    
    # Type-safe queries with Pydantic validation
    aircraft_repo = AircraftRepository(session)
    aircraft = aircraft_repo.find_by_tail_number("N12345")
    
    # Traverse relationships
    flight_repo = FlightRepository(session)
    flights = flight_repo.find_by_aircraft(aircraft.aircraft_id, limit=10)
    
    session.close()

Repository methods return Optional[Model] or List[Model], never raw dicts. All inputs validated via Pydantic before query execution.

Packaging

Modern pyproject.toml (PEP 621) with:

• Runtime deps: neo4j>=5.0, pydantic>=2.0
• Dev deps: pytest, testcontainers
• Package discovery configured to exclude examples/images

Executable example in examples/usage_example.py demonstrates all repositories.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• 0.0.0.0.in-addr.arpa
  • Triggering command: /opt/java/openjdk/bin/java -cp /var/lib/neo4j/plugins/*:/var/lib/neo4j/conf/*:/var/lib/neo4j/lib/* -XX:+UseG1GC -XX:-OmitStackTraceInFastThrow -XX:+AlwaysPreTouch -XX:+UnlockExperimentalVMOptions -XX:+TrustFinalNonStaticFields -XX:+DisableExplicitGC -Djdk.nio.maxCachedBufferSize=1024 -Dio.netty.tryReflectionSetAccessible=true -Djdk.tls.ephemeralDHKeySize=2048 -Djdk.tls.rejectClientInitiatedRenegotiation=true -XX:FlightRecorderOptions=stackdepth=256 -XX:+UnlockDiagnosticVMOptions -XX:+DebugNonSafepoints --add-opens=java.base/java.nio=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/sun.nio.ch=ALL-UNNAMED -Dlog4j2.disable.jmx=true -Dfile.encoding=UTF-8 org.neo4j.server.CommunityEntryPoint --home-dir=/var/lib/neo4j --config-dir=/var/lib/neo4j/conf --console-mode (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Create a starting python client for working with aircraft data</issue_title>
<issue_description>Create a starting python client for working with aircraft data in the Neo4j database and include an architecture markdown with mermaid diagrams</issue_description>

Comments on the Issue (you are @copilot in this section)

Custom agent used: neo4j-docker-client-generator
AI agent that generates simple, high-quality Python Neo4j client libraries from GitHub issues with proper best practices

• Fixes Create a starting python client for working with aircraft data #39

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