Align ac:property-label cache lookup with documentPool key shape

The pre-cached vocabulary documentPool keys entries under
resolve-uri(ac:document-uri(<ns>), \$ac:contextUri) — ac:document-uri strips the
trailing fragment so hash namespaces like &http; are stored under
http://www.w3.org/2011/http (no #). The ac:property-label mode C branch was
looking up documents via doc-available(namespace-uri()) / document(namespace-uri()),
which still includes the # for hash vocabs, so the lookup missed and labels for
http:*, rdf:*, rdfs:*, spin:* etc. fell through to the local-name() fallback.
Slash-namespace vocabs (dct:, etc.) happened to work because there's no fragment
to strip on either side. Server-side Saxon was unaffected because Java's URI
resolver fetches over HTTP and the wire layer drops the fragment naturally.

Wrap the lookup in ac:document-uri(namespace-uri()) so it matches the cache key.
Also drops the temporary xsl:message debug lines added in #298.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: namedgraph

src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/imports/default.xsl

@@ -416,17 +416,12 @@ exclude-result-prefixes="#all"
                 <xsl:apply-templates select="key('resources', $this)" mode="ac:label"/>
             </xsl:when>
             <xsl:when test="$property-metadata/key('resources', $this, .)">
-               <xsl:message>ac:property-label mode B $this: <xsl:value-of select="$this"/></xsl:message>
-
                 <xsl:apply-templates select="$property-metadata/key('resources', $this, .)" mode="ac:label"/>
             </xsl:when>
-            <xsl:when test="doc-available(namespace-uri()) and key('resources', $this, document(namespace-uri()))">
-                <xsl:message>ac:property-label mode C $this: <xsl:value-of select="$this"/></xsl:message>
-                <xsl:apply-templates select="key('resources', $this, document(namespace-uri()))" mode="ac:label"/>
+            <xsl:when test="doc-available(ac:document-uri(namespace-uri())) and key('resources', $this, document(ac:document-uri(namespace-uri())))">
+                <xsl:apply-templates select="key('resources', $this, document(ac:document-uri(namespace-uri())))" mode="ac:label"/>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:message>ac:property-label mode D $this: <xsl:value-of select="$this"/></xsl:message>
-    
                 <xsl:sequence select="local-name()"/>
             </xsl:otherwise>
         </xsl:choose>