test: remove completed MongoDB 5.x array investigation tests

The 'WebSocket dbAdd Array Handling Investigation' block was R&D to
understand insertOne behavior with arrays. The investigation concluded:
- MongoDB's insertOne([a,b]) creates single doc (not multiple)
- Fix: sequential processing via processNextItem() in websocket.js

Production tests now cover this behavior:
- 'dbAdd with array input for treatments - current behavior test'
- 'dbAdd with array input for devicestatus - current behavior test'
- 'dbAdd with array input for entries - current behavior test'

Removes 2 flaky investigative tests, keeps 729 production tests passing.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/websocket.shape-handling.test.js

@@ -488,156 +488,3 @@ describe('WebSocket Shape Handling - dbAdd Single vs Array Input', function () {
     });
   });
 });
-
-describe('WebSocket dbAdd Array Handling Investigation', function () {
-  this.timeout(15000);
-  var self = this;
-  
-  var http = require('http');
-  var io = require('socket.io-client');
-
-  beforeEach(function (done) {
-    process.env.API_SECRET = 'this is my long pass phrase';
-    self.env = require('../lib/server/env')();
-    self.env.settings.authDefaultRoles = 'readable';
-    self.env.settings.enable = ['careportal', 'api'];
-    
-    require('../lib/server/bootevent')(self.env, language).boot(function booted(ctx) {
-      self.ctx = ctx;
-      self.ctx.ddata = require('../lib/data/ddata')();
-      
-      var app = require('express')();
-      app.enable('api');
-      
-      var server = http.createServer(app);
-      
-      require('../lib/server/websocket')(self.env, ctx, server);
-      
-      server.listen(0, function () {
-        self.port = server.address().port;
-        self.server = server;
-        done();
-      });
-    });
-  });
-
-  afterEach(function (done) {
-    if (self.socket) {
-      self.socket.disconnect();
-    }
-    if (self.server) {
-      self.server.close(done);
-    } else {
-      done();
-    }
-  });
-
-  function connectAndAuthorize(callback) {
-    var socket = io('http://localhost:' + self.port, {
-      transports: ['websocket'],
-      reconnection: false
-    });
-    
-    socket.on('connect', function () {
-      socket.emit('authorize', {
-        client: 'test',
-        secret: 'b723e97aa97846eb92d5264f084b2823f57c4aa1'
-      }, function (authResult) {
-        self.socket = socket;
-        callback(null, socket, authResult);
-      });
-    });
-    
-    socket.on('connect_error', function (err) {
-      callback(err);
-    });
-  }
-
-  describe('Array input behavior with insertOne (MongoDB 5.x migration)', function () {
-    
-    beforeEach(function (done) {
-      self.ctx.treatments.remove({ find: { created_at: { '$gte': '1999-01-01T00:00:00.000Z' } } }, function () {
-        done();
-      });
-    });
-
-    it('verify insertOne behavior when array is passed - EXPECTED TO DEMONSTRATE ISSUE', function (done) {
-      connectAndAuthorize(function (err, socket, authResult) {
-        if (err) return done(err);
-        
-        var now = Date.now();
-        var testArray = [
-          { eventType: 'Note', created_at: new Date(now).toISOString(), notes: 'array item 1' },
-          { eventType: 'Note', created_at: new Date(now + 1000).toISOString(), notes: 'array item 2' },
-          { eventType: 'Note', created_at: new Date(now + 2000).toISOString(), notes: 'array item 3' }
-        ];
-        
-        socket.emit('dbAdd', {
-          collection: 'treatments',
-          data: testArray
-        }, function (result) {
-          console.log('Array input result type:', typeof result);
-          console.log('Array input result:', JSON.stringify(result, null, 2));
-          
-          waitForConditionWithWarning({
-            condition: function(cb) {
-              self.ctx.treatments.list({}, cb);
-            },
-            assertion: function(list) {
-              console.log('Total treatments in DB after array dbAdd:', list.length);
-              console.log('Treatments:', JSON.stringify(list, null, 2));
-              list.length.should.be.greaterThanOrEqual(1);
-            },
-            done: done,
-            operationName: 'dbAdd array treatments verification',
-            warningThreshold: 200,
-            maxTimeout: 5000
-          });
-        });
-      });
-    });
-
-    it('compare single dbAdd calls vs one array dbAdd call', function (done) {
-      connectAndAuthorize(function (err, socket, authResult) {
-        if (err) return done(err);
-        
-        var now = Date.now();
-        var count = 0;
-        var results = [];
-        
-        function addTreatment(index) {
-          socket.emit('dbAdd', {
-            collection: 'treatments',
-            data: {
-              eventType: 'Note',
-              created_at: new Date(now + index * 1000).toISOString(),
-              notes: 'individual item ' + index
-            }
-          }, function (result) {
-            results.push(result);
-            count++;
-            if (count === 3) {
-              waitForConditionWithWarning({
-                condition: function(cb) {
-                  self.ctx.treatments.list({}, cb);
-                },
-                assertion: function(list) {
-                  console.log('Total treatments after 3 individual dbAdd calls:', list.length);
-                  list.length.should.be.greaterThanOrEqual(3);
-                },
-                done: done,
-                operationName: 'individual dbAdd calls verification',
-                warningThreshold: 200,
-                maxTimeout: 5000
-              });
-            }
-          });
-        }
-        
-        addTreatment(0);
-        addTreatment(1);
-        addTreatment(2);
-      });
-    });
-  });
-});