refactor(domain): one owner each for non-empty text schemas and UTF-8 head excerpts (#10569)

Fifteen domain schema files each declared z.string().min(1), eight of them
as boundedTextSchema although it bounds nothing. They now share
nonEmptyTextSchema from src/domain/textSchemas.ts; the one trimming copy in
reconstructionCoverage.ts is renamed trimmedTextSchema.

Three private UTF-8 prefix truncators (gdb recent MI records, rizin
diagnostics, environment replay) and src/process/boundedUtf8Text.ts are
replaced by utf8HeadExcerpt in src/domain/utf8HeadExcerpt.ts, which encodes
only the retained prefix and returns a slice of the source text.

src/domain/javascript/javascriptSemanticGraphSchemas.ts

@@ -9,8 +9,8 @@ import {
 } from "./javascriptApplicationEvidenceSchemas.js";
 import { jsonValueSchema } from "../jsonValue.js";
 import { digestSchema, prefixedDigestSchema } from "../digests.js";
+import { nonEmptyTextSchema } from "../textSchemas.js";
 
-const boundedTextSchema = z.string().min(1);
 const semanticNodeIdSchema = prefixedDigestSchema("jsrg_node");
 const semanticRelationIdSchema = z
   .string()
@@ -278,7 +278,7 @@ export const javaScriptSemanticUnknownInputSchema = z.strictObject({
   family: z.enum(JAVASCRIPT_SEMANTIC_RELATION_FAMILIES),
   relation_kinds: z.array(z.enum(JAVASCRIPT_SEMANTIC_RELATIONS)).min(1),
   reason: z.enum(JAVASCRIPT_SEMANTIC_UNKNOWN_REASONS),
-  detail: boundedTextSchema,
+  detail: nonEmptyTextSchema,
   candidate_node_ids: z.array(semanticNodeIdSchema),
   evidence: applicationGraphEvidenceSchema,
 });
@@ -315,7 +315,7 @@ export const javaScriptSemanticFingerprintInputSchema = z.strictObject({
   algorithm: z.literal("rea.javascript-semantic-function"),
   status: z.enum(["complete", "partial", "unavailable"]),
   components: fingerprintComponentsSchema,
-  limitations: z.array(boundedTextSchema),
+  limitations: z.array(nonEmptyTextSchema),
   evidence: applicationGraphEvidenceSchema,
 });
 
@@ -364,7 +364,7 @@ export const javaScriptSemanticGraphInputSchema = z.strictObject({
   fingerprints: z.array(javaScriptSemanticFingerprintSchema),
   unknowns: z.array(javaScriptSemanticUnknownSchema),
   coverage: graphCoverageSchema,
-  limitations: z.array(boundedTextSchema),
+  limitations: z.array(nonEmptyTextSchema),
 });
 
 /** Stored JavaScript Semantic Relation Graph. */