fix: Ensure necessary namespaces are in patched doc (#2698)

* refactor: Extract timestamp properties

In preparation for reworking DocumentAttributes.

* refactor: Consolidate namespaces

* fix: Ensure necessary namespaces are in patched doc

Fixes #2697

* Fix tsc and ESLint errors

* Fix CSpell

* Add a test to fix code coverage failure

.cspell.json

@@ -8,11 +8,14 @@
     // words - list of words to be always considered correct
     "words": [
         "Abjad",
+        "aink",
         "aiueo",
         "ATLEAST",
         "chosung",
         "clippy",
         "datas",
+        "dcmitype",
+        "dcterms",
         "docsify",
         "dolan",
         "execa",
@@ -32,6 +35,7 @@
         "panose",
         "rels",
         "rsid",
+        "sdtdh",
         "twip",
         "twips",
         "Xmlable",