GraphQLite 0.3.8

Bare relationship syntax is here. (a)--(b), -->, and <-- just work now. Undirected matches also got a correctness fix — they now properly query both edge directions instead of silently going forward-only.

Leading-zero strings stay strings. Zip codes like "02134" no longer get silently coerced to 2134 when returned via property access. Fixed at the C layer.

Rust bindings got a lot more ergonomic:

• PropertyValue enum — pass typed values (42_i64, 0.87_f64, true) directly to upsert, not just strings
• Value::get("key") and Index<&str> — no more pattern matching to read node properties
• get_edges_from(), get_edges_to(), get_edges_by_type() — edge queries without raw Cypher
• Graph::query_params() — one-liner parameterized queries
• GraphStats fields renamed to node_count/edge_count (breaking)

Python binding bug fixes:

• BFS/DFS and APSP now return actual results (were silently returning [])
• Same node_count/edge_count rename for consistency

Algorithm parameters work correctly — integer and double params passed to graph algorithms no longer cause segfaults (#29).

Big shout-out to @kynx for their first contribution to GraphQLite! Welcome aboard.

Full Changelog: v0.3.7...v0.3.8