Apply Roslyn/dotnet-format fixes across NeonSprawl.Server and
NeonSprawl.Server.Tests: collection expressions, concrete helper
return types, record XML docs, logging guards, quest store refactors,
and removal of redundant usings via GlobalUsings.cs. Extend
csharp-style.md with the recurring patterns.
Add two prototype factions, extend quest bundles with reputationGrants
and factionGateRules, freeze five-quest roster in validate_content.py,
and sync minimal server quest roster parity for green startup tests.
VinPropane