Replace fixture player ids with POST …/__dev/mastery-fixture (resetPerkState,
absolute skillXp). Bruno deny tests set state in pre-request on dev-local-1.
Gated to Development/Testing or Game:EnableMasteryFixtureApi.
Seed neo48-perk-fresh and neo48-perk-branch via Game:FixturePlayerIds;
level_too_low uses isolated fresh player, branch_already_chosen sets up
neo48-perk-branch in pre-request instead of skipping on shared state.
Wire IPositionStateStore to Npgsql when ConnectionStrings:NeonSprawl is set,
with versioned DDL under server/db/migrations and a shared PostgresPositionBootstrap
for schema plus dev-player seeding at host startup. In-memory tests override Postgres
registrations when CI sets the connection string globally.
Add GitHub Actions Postgres service for dotnet test, server README updates,
decomposition and implementation-plan docs, code review write-up, and C# brace
conventions in csharp-style rule.
VinPropane