Excel generation adapter using docjure (Apache POI wrapper).

Builds one worksheet per entry in :sheets, or derives a single sheet
from :sections when :sheets is not provided.

Usage:
  (def xl-gen (create-excel-generator))
  (generate! xl-gen my-report-def data {})
  ;; => {:bytes #bytes[...] :type :excel :filename "my-report.xlsx"}

PDF generation adapter using OpenHTMLtoPDF.

Three-step pipeline:
  1. Render Hiccup → HTML string (via hiccup.core/html)
  2. Inject default CSS from resources/boundary/reports/default.css
  3. Pass HTML to PdfRendererBuilder → ByteArrayOutputStream → bytes

Usage:
  (def pdf-gen (create-pdf-generator))
  (generate! pdf-gen my-report-def data {})
  ;; => {:bytes #bytes[...] :type :pdf :filename "my-report.pdf"}

Word (DOCX) generation adapter using Apache POI XWPF.

Apache POI is already on the classpath as a transitive dependency
via docjure → poi-ooxml. No new Maven dependencies are needed.

Supports the same declarative :sections API as the Excel adapter.
The :template key is PDF-only and is ignored here.

Usage:
  (def wd-gen (create-word-generator))
  (generate! wd-gen my-report-def data {})
  ;; => {:bytes #bytes[...] :type :word :filename "my-report.docx"}