refactor(domain): split error taxonomy into thematic modules (#636)

Move each error family out of domain/errors.ts into its own module
(base, core, provider selection/adapter, browser observation,
artifact, evidence, unknown registry, hopper, configuration) and
relocate AnalysisErrorProjection to analysisErrorProjection.
Migrate all 162 importers to the owning modules and delete
errors.ts. No re-export shims; behavior is unchanged.

src/server/registerJavaScriptRuntimeObservationTools.ts

@@ -8,7 +8,7 @@ import {
 } from "../application/JavaScriptRuntimeObservationService.js";
 import { JAVASCRIPT_RUNTIME_OBSERVATION_TOOL_CONTRACTS } from "../contracts/javascriptRuntimeObservationToolContracts.js";
 import type { ToolContract } from "../contracts/toolContracts.js";
-import type { AnalysisError } from "../domain/errors.js";
+import type { AnalysisError } from "../domain/analysisErrorBase.js";
 import type { Evidence } from "../domain/evidence.js";
 import type { Result } from "../domain/result.js";
 import { observeJavaScriptRuntimeInputSchema } from "../domain/javascriptRuntimeObservation.js";