Updates the classes diagram in documentation

** Why are these changes being introduced:

There are some changes needed to the classes diagram, to keep things
current as we've built out this categorization process.

** Relevant ticket(s):

* https://mitlibraries.atlassian.net/browse/tco-83

** How does this address that need:

This updates the class diagram with the new methods, and new method
names, which have been added to the application. There were also some
misnamed classes ("DetectionCategory" instead of "DetectorCategory"),
which this fixes.

Additionally, this tries out namespaces in Mermaid to account for
class names like Detector::Journal, which haven't been included in the
diagram yet.

** Document any side effects to this change:

I may be overthinking this - but I'm finding this diagram to be very
helpful as we build out the application, and I'd like to try and keep
it as current as we can.

docs/reference/classes.md

@@ -18,25 +18,22 @@ classDiagram
   Term "1" --> "0..*" Categorization
   Detection "0..*" --> "1" Detector
 
-  DetectionCategory "0..*" --> "1" Category
+  DetectorCategory "0..*" --> "1" Category
 
   Categorization "0..*" --> "1" Category
 
-  Detector "1" --> "0..*" DetectionCategory
+  Detector "1" --> "0..*" DetectorCategory
 
   class User
     User: +String uid
     User: +String email
     User: +Boolean admin
-  
+
   class Term
     Term: id
     Term: +String phrase
-    Term: calculateCategory()
+    Term: combinedScores()
     Term: recordDetections()
-    Term: recordPatterns()
-    Term: recordJouranls()
-    Term: recordSuggestedResources()
 
   class SearchEvent
     SearchEvent: +Integer id
@@ -53,13 +50,11 @@ classDiagram
     Detection: current()
     Detection: for_detector()
     Detection: for_term()
+    Detection: scores()
 
   class Detector
     Detector: +Integer id
     Detector: +String name
-    Detector: +Float confidence
-    Detector: incrementConfidence()
-    Detector: decrementConfidence()
 
   class Category
     Category: +Integer id
@@ -69,21 +64,60 @@ classDiagram
     Categorization: +Integer category_id
     Categorization: +Integer term_id
     Categorization: +Float confidence
-
-  class DetectionCategory
-    DetectionCategory: +Integer id
-    DetectionCategory: +Integer detector_id
-    DetectionCategory: +Integer category_id
-    DetectionCategory: +Float confidence
-    DetectionCategory: incrementConfidence()
-    DetectionCategory: decrementConfidence()
+    Categorization: +String detector_version
+    Categorization: current()
+
+  class DetectorCategory
+    DetectorCategory: +Integer id
+    DetectorCategory: +Integer detector_id
+    DetectorCategory: +Integer category_id
+    DetectorCategory: +Float confidence
+    DetectorCategory: incrementConfidence()
+    DetectorCategory: decrementConfidence()
+
+  class DetectorJournal
+    DetectorJournal: full_term_match()
+    DetectorJournal: partial_term_match()
+    DetectorJournal: record()
+
+  class DetectorStandardIdentifier
+    DetectorStandardIdentifier: record()
+
+  class DetectorSuggestedResource
+    DetectorSuggestedResource: bulk_replace()
+    DetectorSuggestedResource: calculate_fingerprint()
+    DetectorSuggestedResource: full_term_match()
+    DetectorSuggestedResource: record()
+    DetectorSuggestedResource: update_fingerprint()
+
+
+  namespace SearchActivity{
+    class Term
+    class SearchEvent
+  }
+
+  namespace KnowledgeGraph{
+    class Detectors
+    class DetectorCategory
+    class Category
+  }
+
+  namespace Detectors {
+    class Detector
+    class DetectorJournal["Detector::Journal"]
+    class DetectorStandardIdentifier["Detector::StandardIdentifiers"]
+    class DetectorSuggestedResource["Detector::SuggestedResource"]
+  }
 
   style SearchEvent fill:#000,stroke:#66c2a5,color:#66c2a5,stroke-width:4px;
   style Term fill:#000,stroke:#66c2a5,color:#66c2a5,stroke-width:4px;
 
   style Category fill:#000,stroke:#fc8d62,color:#fc8d62
-  style DetectionCategory fill:#000,stroke:#fc8d62,color:#fc8d62
+  style DetectorCategory fill:#000,stroke:#fc8d62,color:#fc8d62
   style Detector fill:#000,stroke:#fc8d62,color:#fc8d62
+  style DetectorJournal fill:#000,stroke:#fc8d62,color:#fc8d62
+  style DetectorStandardIdentifier fill:#000,stroke:#fc8d62,color:#fc8d62
+  style DetectorSuggestedResource fill:#000,stroke:#fc8d62,color:#fc8d62
 
   style Categorization fill:#000,stroke:#8da0cb,color:#8da0cb,stroke-dasharray: 3 5;
   style Detection fill:#000,stroke:#8da0cb,color:#8da0cb,stroke-dasharray: 3 5;