telemetry(amazonq): metrics for code symbols, chat history, export #1023

## Problem
- There is no telemetry for # and length of `@Code` added to messages by
users
- There is no telemetry to measure metrics for chat history and export
features:
  - Number of tabs automatically restored from history
- Number of users exporting chat transcripts, with which format
(markdown vs html)
- Number of users who are opening chat history list (will use existing
ui_click metric, no changes needed in this PR)
- Number of users who are searching, exporting, deleting, and opening
conversations from history
  - How long it takes to complete history searches
  - History file sizes, time to load history files into memory

## Solution
Add the following metrics:
- amazonq_exportTab
- amazonq_loadHistory
- amazonq_performChatHistoryAction

To measure code symbol use, add the following types to
amazonq_addMessage metric:
- cwsprChatCodeContextCount
- cwsprChatCodeContextLength
- cwsprChatCodeContextTruncatedLength

Author: avi-alpert

telemetry/definitions/commonDefinitions.json

@@ -55,6 +55,11 @@
             "type": "double",
             "description": "The time it takes to generate code generation response"
         },
+        {
+            "name": "amazonqHistoryFileSize",
+            "type": "int",
+            "description": "The size of a chat history file (in bytes)"
+        },
         {
             "name": "amazonqNumberOfFilesAccepted",
             "type": "double",
@@ -75,6 +80,16 @@
             "type": "double",
             "description": "Captures the size of the source code"
         },
+        {
+            "name": "amazonqTimeToLoadHistory",
+            "type": "int",
+            "description": "The time (in milliseconds) it takes to load chat history from filesystem"
+        },
+        {
+            "name": "amazonqTimeToSearchHistory",
+            "type": "int",
+            "description": "The time (in milliseconds) it takes to search through all messages in chat history for a user-provided search string"
+        },
         {
             "name": "amazonqUploadIntent",
             "type": "string",
@@ -1009,6 +1024,21 @@
             "type": "int",
             "description": "Index of the code block inside a message in the conversation."
         },
+        {
+            "name": "cwsprChatCodeContextCount",
+            "type": "int",
+            "description": "Number of code symbols added to context"
+        },
+        {
+            "name": "cwsprChatCodeContextLength",
+            "type": "int",
+            "description": "Total length of code symbols added to context"
+        },
+        {
+            "name": "cwsprChatCodeContextTruncatedLength",
+            "type": "int",
+            "description": "Truncated length of code symbols added to context"
+        },
         {
             "name": "cwsprChatConversationId",
             "type": "string",
@@ -1837,6 +1867,11 @@
             "type": "string",
             "description": "The old version of something. Useful when updating dependent resources."
         },
+        {
+            "name": "openTabCount",
+            "type": "int",
+            "description": "The number of tabs automatically opened from history"
+        },
         {
             "name": "parentId",
             "type": "string",
@@ -2247,6 +2282,18 @@
                     "type": "cwsprChatActiveEditorTotalCharacters",
                     "required": false
                 },
+                {
+                    "type": "cwsprChatCodeContextCount",
+                    "required": false
+                },
+                {
+                    "type": "cwsprChatCodeContextLength",
+                    "required": false
+                },
+                {
+                    "type": "cwsprChatCodeContextTruncatedLength",
+                    "required": false
+                },
                 {
                     "type": "cwsprChatConversationId"
                 },
@@ -2602,6 +2649,20 @@
                 }
             ]
         },
+        {
+            "name": "amazonq_exportTab",
+            "description": "When a user exports the current Amazon Q chat tab",
+            "metadata": [
+                {
+                    "type": "filenameExt",
+                    "required": true
+                },
+                {
+                    "type": "languageServerVersion",
+                    "required": false
+                }
+            ]
+        },
         {
             "name": "amazonq_feedback",
             "description": "When a user gives feedback using vote or comment or rating in the conversation",
@@ -2788,6 +2849,28 @@
                 }
             ]
         },
+        {
+            "name": "amazonq_loadHistory",
+            "description": "When a history file is loaded from the filesystem and open tabs are restored",
+            "metadata": [
+                {
+                    "type": "amazonqHistoryFileSize",
+                    "required": true
+                },
+                {
+                    "type": "amazonqTimeToLoadHistory",
+                    "required": true
+                },
+                {
+                    "type": "languageServerVersion",
+                    "required": false
+                },
+                {
+                    "type": "openTabCount",
+                    "required": true
+                }
+            ]
+        },
         {
             "name": "amazonq_messageResponseError",
             "description": "When an error has occured in response to a prompt",
@@ -2863,6 +2946,32 @@
                 }
             ]
         },
+        {
+            "name": "amazonq_performChatHistoryAction",
+            "description": "When a user searches, exports, opens, or deletes a conversation from history",
+            "metadata": [
+                {
+                    "type": "action",
+                    "required": true
+                },
+                {
+                    "type": "amazonqHistoryFileSize",
+                    "required": false
+                },
+                {
+                    "type": "amazonqTimeToSearchHistory",
+                    "required": false
+                },
+                {
+                    "type": "filenameExt",
+                    "required": false
+                },
+                {
+                    "type": "languageServerVersion",
+                    "required": false
+                }
+            ]
+        },
         {
             "name": "amazonq_startConversationInvoke",
             "description": "Captures startConversation invocation process",