fix(sprint1): RFC 2046 CRLF, MergeLabels, search URL, typed function params, bounded function namespace

S1-1: Replace \n with \r\n in batchExecute() per RFC 2046 (fixes changeset double-CRLF post-audit)
S1-2: Add MSCRM.MergeLabels: true on updateEntityDefinition PATCH and updateAttribute PUT
      Remove undocumented If-Match: * from metadata PATCH (post-audit fix)
S1-3: Add DataverseActionsClient.search() with absolute URL from environmentUrl
      Fix regex to handle optional trailing slash in baseURL
S1-4: Fix detect_duplicates description - reflect actual FetchXML OR implementation
S1-5: Support typed parameters in executeFunction (number, boolean, object aliases)
      Fix executeBoundFunction: add Microsoft.Dynamics.CRM. namespace prefix (post-audit)

Tests: +15 new tests (batch-crlf, search-url, execute-function-typed) - 516/516 passing

Author: Dev Agent Amelia