Graphify Files

Correctness release: a C# receiver-typing regression fix, direction-respecting shortest paths, and a set of hyperedge merge/load integrity fixes.

• Fix: C# receiver typing no longer drops a true call when a same-named variable is declared untypeably elsewhere in the method (#2472, thanks @JensD-git). Receiver types are now tracked per lexical declaration scope and resolved by the call's position, so a typed static local-function parameter keeps resolving even when an out var reuses the name in the enclosing body. This fixes a regression from 0.9.32 (#2346). Cross-method independence (#2299) and field-conflict poisoning are unchanged; an out var receiver itself remains untyped.
• Fix: graphify path (and the MCP shortest_path tool) now respect edge direction by default instead of running on an undirected view, so a returned path no longer traverses edges backwards (#2487, thanks @luliaz0601). Direction is recovered from the stored _src/_tgt markers. Pass --undirected (CLI) or undirected=true (MCP) to search ignoring direction; when no directed path exists the command says so instead of silently returning a reversed one.
• Fix: semantic extraction no longer aborts at merge with a TypeError when a hyperedge carries dict-shaped members (#2486, thanks @adminwat). Members are normalized to ids (or dropped with a warning) so a malformed hyperedge can no longer destroy a completed extraction.
• Fix: graphify merge-graphs no longer drops hyperedges (#2484, thanks @sortakool, and @oleksii-tumanov for the approach in [#1691]). Hyperedge member ids and ids are now relabeled with the per-repo prefix, both inputs' hyperedges are unioned instead of one clobbering the other, and they are written to both the top-level and nested slots.
• Fix: build_from_json now reads hyperedges from both the top-level and nested graph slots, so label and re-cluster runs no longer silently empty a graph's hyperedge set (#2485, thanks @sortakool); a full validation wipeout is now reported loudly.
• Fix: the skill flow now passes the curated community labels to to_json, so graph.json ships with community_name on nodes instead of dropping it (#2490, thanks @PapiScholz).