(DOCSP-18945): densify stage

Add temperature examples to densify

Author: jeff-allen-mongo

config/redirects

@@ -1797,6 +1797,7 @@ raw: /manual/core/wildcard -> ${base}/manual/core/index-wildcard/
 
 [v3.6-v5.0]: /${version}/reference/operator/aggregation/tsIncrement/ -> ${base}/${version}/reference/operator/aggregation/
 [v3.6-v5.0]: /${version}/reference/operator/aggregation/tsSecond/ -> ${base}/${version}/reference/operator/aggregation/
+[v3.6-v5.0]: /${version}/reference/operator/aggregation/densify/ -> ${base}/${version}/reference/operator/aggregation/
 
 #
 # Redirects for new 5.0 pages

source/images/densification-by-partition.png

@@ -42,6 +42,10 @@ content: |
 
           Distinct from the :group:`$count` aggregation accumulator.
 
+      * - :pipeline:`$densify`
+
+        - .. include:: /includes/fact-densify-description.rst
+
       * - :pipeline:`$documents`
         - Returns literal documents from input expressions.
 

source/images/densification-full-range.png

@@ -0,0 +1,2 @@
+Creates new documents in a sequence of documents where certain values
+in a field are missing.

source/includes/extracts-agg-stages.yaml

@@ -0,0 +1,4 @@
+- The darker squares represent the original documents in the collection.
+
+- The lighter squares represent the documents created with
+  :pipeline:`$densify`.

source/includes/fact-densify-description.rst

@@ -103,7 +103,12 @@ Alphabetical Listing of Stages
    * - :pipeline:`$currentOp`
 
      - Returns information on active and/or dormant operations for the
-       MongoDB deployment. To run, use the :method:`db.aggregate()` method.
+       MongoDB deployment. To run, use the :method:`db.aggregate()`
+       method.
+       
+   * - :pipeline:`$densify`
+
+     - .. include:: /includes/fact-densify-description.rst
 
 
    * - :pipeline:`$facet`
@@ -325,6 +330,7 @@ Alphabetical Listing of Stages
    /reference/operator/aggregation/collStats
    /reference/operator/aggregation/count
    /reference/operator/aggregation/currentOp
+   /reference/operator/aggregation/densify
    /reference/operator/aggregation/documents
    /reference/operator/aggregation/facet
    /reference/operator/aggregation/geoNear