refactor!: simplify runtime tools and remove replay engines (#572)

* fix(hopper): report unavailable procedure body coverage

* refactor!: simplify runtime tools and remove replay engines

Keep direct inspection, capture, and comparison tools. Bind handlers to named contracts and let agents compose experiments with commands and local fixture servers.

BREAKING CHANGE: Remove controlled replay, Node characterization, finite replay-machine, managed runtime planning, and redundant string-tracing tools. Retire process replay, shims, reactive scenarios, custom checkpoints, and active browser replay and origin-scope inputs.

docs/javascript-application-graph.md

@@ -97,7 +97,7 @@ correspondence is a separately identified cross-layer inference.
 Every observation and edge carries all of the following:
 
 - an authority, such as artifact bytes, AST analysis, static relationship
-  inference, passive CDP runtime, cross-layer reconciliation, controlled replay,
+  inference, passive CDP runtime, and cross-layer reconciliation,
   native analysis, historical reference, or user assertion;
 - an epistemic state: `observed`, `inferred`, `unknown`, or `unavailable`;
 - confidence independently bounded as exact, high, medium, low, or unknown;