docs: update history api documentation

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

docs/web_api.md

@@ -1612,47 +1612,77 @@ The APIs below are avilable when the `[history]` plugin has been configured.
 
 ### Get job list
 - HTTP command:\
-  `GET /server/history/list?limit=50&start=50&since=1&before=5&id=1`
+  `GET /server/history/list?limit=50&start=50&since=1&before=5`
 
 - Websocket command:\
   `{"jsonrpc":"2.0","method":"server.history.list","id":"1","params":{}}`
 
   All arguments are optional. Arguments are as follows:
-`before` All jobs before this UNIX timestamp
-`id` ID of job to display. This overrides other arguments.
-`limit` Number of prints to return
-`since` All jobs after this UNIX timestamp
-`start` Record number to start from (i.e. 10 would start at the 10th print)
+  - `before` All jobs before this UNIX timestamp
+  - `limit` Number of prints to return
+  - `since` All jobs after this UNIX timestamp
+  - `start` Record number to start from (i.e. 10 would start at the 10th print)
 
 - Returns an array of jobs that have been printed
   ```json
   {
-      count: <number of prints>
-      prints: {
-        <id>: {
+      count: <number of prints>,
+      jobs: [
+        {
+            "job_id": <unique job id>,
             "end_time": <end_time>,
-            "filament_used": <filament_used>
+            "filament_used": <filament_used>,
             "filename": <filename>,
-            "metadata": {}, # Array of file metadata
+            "metadata": {}, // Object containing metadata at time of job
+            "print_duration": <print_duration>,
+            "status": <status>,
+            "start_time": <start_time>,
+            "total_duration": <total_duration>
+        },
+        ...
+      ]
+  }
+  ```
+
+### Get a single job
+- HTTP command:\
+  `GET /server/history/job?uid=<id>`
+
+- Websocket command:\
+  `{"jsonrpc":"2.0","method":"server.history.get_job","id":"1",
+  "params":{"uid": <id>}}`
+
+- Returns:
+  Data associated with the job ID in the following format:
+  ```json
+  {
+      "job": {
+        "job_id": <unique job id>,
+        "end_time": <end_time>,
+        "filament_used": <filament_used>,
+        "filename": <filename>,
+        "metadata": {}, // Object containing metadata at time of job
         "print_duration": <print_duration>,
         "status": <status>,
         "start_time": <start_time>,
         "total_duration": <total_duration>
       }
   }
-  }
   ```
 
 ### Delete job
 - HTTP command:\
-`DELETE /server/history/delete?all`
+  `DELETE /server/history/job?uid=<id>`
+
+  Note: it is possible to replace the "uid" argument with `all=true`
+  to delete all jobs.
 
 - Websocket command:\
-`{"jsonrpc":"2.0","method":"server.history.delete","id":"1","params":{}}`
+  `{"jsonrpc":"2.0","method":"server.history.delete_job","id":"1",
+  "params":{"uid": <id>}}`
 
-One argument from below is required:
-`all` Set to true to delete all history
-`id` Delete specific job
+  Note: it is possible to replace the "uid" argument with `"all": true`
+  to delete all jobs.
 
 - Returns an array of deleted ids
 ```json
@@ -1831,6 +1861,21 @@ response from a [process info](#get-process-info) request.  It is possible
 for clients to receive this notification multiple times if the system
 repeatedly transitions between an active and inactive throttled condition.
 
+### History Changed
+If the `[history]` module is enabled the following notification is sent when
+a job is added or finished:
+
+`{jsonrpc: "2.0", method: "notify_history_changed", params: [history_state]}`
+
+Where `history_state` is an object in the following format:
+```json
+{
+    "action": "added" or "finished",
+    "job": <job object>
+}
+```
+The `job` field matches the object returned when requesting
+[job data](#get-a-single-job).
 # Appendix
 
 ## Websocket setup