feat: add agent timings

[lizard-boy]

Adds timing information for workspace agent scripts.

Closes coder#14630

Demo
Extend the default docker template with the following scripts.

resource "coder_script" "say_hi" {
  agent_id     = coder_agent.main.id
  display_name = "say hi"
  run_on_start       = true
  start_blocks_login = true

  script = <<EOF
    #!/bin/sh

    echo "Hi!"
  EOF
}

resource "coder_script" "exit_1" {
  agent_id     = coder_agent.main.id
  display_name = "exit 1"
  run_on_start       = true
  start_blocks_login = true

  script = <<EOF
    #!/bin/sh

    exit 1
  EOF
}

Create a workspace and start it. This then gives us the following data in our database.

coder=# select * from workspace_agent_script_timings;

                job_id                |  display_name  |          started_at           |           ended_at            | exit_code
--------------------------------------+----------------+-------------------------------+-------------------------------+-----------
 d600be5d-6689-4a19-ba2b-fbecb662a94e | say hi         | 2024-09-18 15:03:35.672631+00 | 2024-09-18 15:03:35.675239+00 |         0
 d600be5d-6689-4a19-ba2b-fbecb662a94e | exit 1         | 2024-09-18 15:03:35.672581+00 | 2024-09-18 15:03:35.675337+00 |         1
 d600be5d-6689-4a19-ba2b-fbecb662a94e | Startup Script | 2024-09-18 15:03:35.672475+00 | 2024-09-18 15:03:42.202995+00 |         0

The provisioner job timings was added in a previous PR but to show that the job_id column correlates I'm showing the data.

SELECT job_id, started_at, ended_at, resource FROM provisioner_job_timings;

                job_id                |          started_at           |           ended_at            |           resource
--------------------------------------+-------------------------------+-------------------------------+-------------------------------
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:28.43633+00  | 2024-09-18 15:03:31.998981+00 | state file
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:32.549759+00 | 2024-09-18 15:03:32.552971+00 | data.coder_workspace.me
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:32.549084+00 | 2024-09-18 15:03:32.55025+00  | data.coder_provisioner.me
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:32.549335+00 | 2024-09-18 15:03:32.552113+00 | data.coder_workspace_owner.me
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:32.608787+00 | 2024-09-18 15:03:33.13758+00  | state file
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:33.615702+00 | 2024-09-18 15:03:33.622065+00 | coder_script.exit_1
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:33.594193+00 | 2024-09-18 15:03:33.600515+00 | docker_volume.home_volume
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:33.597609+00 | 2024-09-18 15:03:33.605776+00 | coder_agent.main
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:33.617404+00 | 2024-09-18 15:03:33.623269+00 | coder_app.code-server
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:34.32222+00  | 2024-09-18 15:03:34.872399+00 | docker_container.workspace[0]
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:33.614933+00 | 2024-09-18 15:03:33.620057+00 | coder_script.say_hi
 d600be5d-6689-4a19-ba2b-fbecb662a94e | 2024-09-18 15:03:33.596363+00 | 2024-09-18 15:03:34.302365+00 | docker_image.main