feat(streaming): establish cost budget ledger

Add the validated frame-work profile, deterministic completion charges, and shadow admission meter before enforcing the scheduler in Slice E2. Lifecycle artifacts now expose elapsed work, would-yield limits, backlog bytes/age, and pending owner ledgers without changing accepted execution.

Tests: dotnet build AcDream.slnx -c Release --no-restore; dotnet test AcDream.slnx -c Release --no-build --no-restore (8124 passed, 5 skipped)

src/AcDream.App/RuntimeOptions.cs

@@ -2,6 +2,7 @@ using System;
 using System.Globalization;
 using System.IO;
 using AcDream.App.Rendering.Residency;
+using AcDream.App.Streaming;
 
 namespace AcDream.App;
 
@@ -52,7 +53,8 @@ public sealed record RuntimeOptions(
     string? AutomationArtifactDirectory,
     float FogStartMultiplier,
     float FogEndMultiplier,
-    ResidencyBudgetOptions ResidencyBudgets)
+    ResidencyBudgetOptions ResidencyBudgets,
+    StreamingWorkBudgetOptions StreamingWorkBudgets)
 {
     /// <summary>
     /// Build options from the process environment. Used by
@@ -110,7 +112,8 @@ public sealed record RuntimeOptions(
                 NullIfEmpty(env("ACDREAM_AUTOMATION_ARTIFACT_DIR")),
             FogStartMultiplier:  TryParseFloat(env("ACDREAM_FOG_START_MULT")) ?? 0.7f,
             FogEndMultiplier:    TryParseFloat(env("ACDREAM_FOG_END_MULT")) ?? 0.95f,
-            ResidencyBudgets:    ResidencyBudgetOptions.Parse(env));
+            ResidencyBudgets:    ResidencyBudgetOptions.Parse(env),
+            StreamingWorkBudgets: StreamingWorkBudgetOptions.Parse(env));
     }
 
     /// <summary>True iff live-mode credentials are present and valid for connecting.</summary>