Bound goal retention and remove pre-release compatibility paths

[EricSun0218]

What changed

• count only active and waiting goals against the GoalLoop capacity
• retain a configurable bounded terminal audit window with persisted ordering
• preserve active goals under concurrent session CAS and across file-store restarts
• remove pre-release action ID, usage bootstrap, persistence migration, and binary-constructor compatibility paths
• keep current persistence schema versions and reject older formats fail-closed
• consolidate the public action factory signature, fixing the downstream CS1737 regression

Why

Long-running actor sessions permanently exhausted their goal capacity after enough terminal goals accumulated. The repository is still pre-adoption, so migration-only branches and duplicate overloads added complexity without serving real users.

Validation

• dotnet build OpenGameAgent.sln --configuration Release --no-restore --nologo (0 warnings, 0 errors)
• dotnet test OpenGameAgent.sln --configuration Release --no-restore --nologo (827/827 passed)
• dotnet format OpenGameAgent.sln --verify-no-changes --no-restore
• DST sidecar source-consumption build reached and compiled the Sidecar against this checkout; its separate dirty test project currently has an unrelated method-group inference error