feat: add onboarding info fields to first user setup (#23989)

Add optional demographic and newsletter preference fields to the setup
page: business use (yes/no), industry type, organization size, and two
newsletter toggles (marketing, release/security updates).

The new data flows through telemetry via a FirstUserOnboarding struct in
the snapshot payload, sent once when the first user is created. The
telemetry-server and BigQuery schema changes are required separately to
persist this data.

---------

Co-authored-by: default <davidiii@fraley.us>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

coderd/apidoc/swagger.json

@@ -13105,6 +13105,59 @@
 				}
 			}
 		},
+		"codersdk.CreateFirstUserOnboardingInfo": {
+			"type": "object",
+			"properties": {
+				"industry_type": {
+					"enum": [
+						"Technology",
+						"Financial Services",
+						"Healthcare",
+						"Government",
+						"Education",
+						"Retail",
+						"Manufacturing",
+						"Media",
+						"Telecom",
+						"Energy",
+						"Transportation",
+						"Consulting",
+						"Non-Profit",
+						"Other"
+					],
+					"allOf": [
+						{
+							"$ref": "#/definitions/codersdk.IndustryType"
+						}
+					]
+				},
+				"is_business": {
+					"type": "boolean"
+				},
+				"newsletter_marketing": {
+					"type": "boolean"
+				},
+				"newsletter_releases": {
+					"type": "boolean"
+				},
+				"org_size": {
+					"enum": [
+						"Just me",
+						"2-10",
+						"11-50",
+						"51-200",
+						"201-1000",
+						"1001-5000",
+						"5000+"
+					],
+					"allOf": [
+						{
+							"$ref": "#/definitions/codersdk.OrgSizeRange"
+						}
+					]
+				}
+			}
+		},
 		"codersdk.CreateFirstUserRequest": {
 			"type": "object",
 			"required": ["email", "password", "username"],
@@ -13115,6 +13168,9 @@
 				"name": {
 					"type": "string"
 				},
+				"onboarding_info": {
+					"$ref": "#/definitions/codersdk.CreateFirstUserOnboardingInfo"
+				},
 				"password": {
 					"type": "string"
 				},
@@ -14914,6 +14970,41 @@
 				}
 			}
 		},
+		"codersdk.IndustryType": {
+			"type": "string",
+			"enum": [
+				"Technology",
+				"Financial Services",
+				"Healthcare",
+				"Government",
+				"Education",
+				"Retail",
+				"Manufacturing",
+				"Media",
+				"Telecom",
+				"Energy",
+				"Transportation",
+				"Consulting",
+				"Non-Profit",
+				"Other"
+			],
+			"x-enum-varnames": [
+				"IndustryTypeTechnology",
+				"IndustryTypeFinancial",
+				"IndustryTypeHealthcare",
+				"IndustryTypeGovernment",
+				"IndustryTypeEducation",
+				"IndustryTypeRetail",
+				"IndustryTypeManufacturing",
+				"IndustryTypeMedia",
+				"IndustryTypeTelecom",
+				"IndustryTypeEnergy",
+				"IndustryTypeTransportation",
+				"IndustryTypeConsulting",
+				"IndustryTypeNonProfit",
+				"IndustryTypeOther"
+			]
+		},
 		"codersdk.InsightsReportInterval": {
 			"type": "string",
 			"enum": ["day", "week"],
@@ -16038,6 +16129,27 @@
 				"OptionTypeListString"
 			]
 		},
+		"codersdk.OrgSizeRange": {
+			"type": "string",
+			"enum": [
+				"Just me",
+				"2-10",
+				"11-50",
+				"51-200",
+				"201-1000",
+				"1001-5000",
+				"5000+"
+			],
+			"x-enum-varnames": [
+				"OrgSizeRangeJustMe",
+				"OrgSizeRange2To10",
+				"OrgSizeRange11To50",
+				"OrgSizeRange51To200",
+				"OrgSizeRange201To1K",
+				"OrgSizeRange1KTo5K",
+				"OrgSizeRange5KPlus"
+			]
+		},
 		"codersdk.Organization": {
 			"type": "object",
 			"required": ["created_at", "id", "is_default", "updated_at"],