Make organization source required

[amcaplan]

WHY are these changes introduced?

Makes the source field required in the Organization type to ensure consistent handling of organization sources across the codebase. This prevents potential undefined behavior when dealing with organization sources, and - most relevant here - allows us to be sure we can report analytics with the correct org ID field.

WHAT is this pull request doing?

Makes the source field non-optional in the Organization interface and updates all test files to include the required source field in organization objects. The changes ensure that organizations always have a defined source, either BusinessPlatform or Partners.

How to test your changes?

Not much to test per se, I'd suggest tophatting with downstream PRs. All we're doing is being more strict about field requirements.

Measuring impact

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes

[amcaplan]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Record business_platform_id not partner_id in remaining cases #5138
• Make organization source required #5137 👈 (View in Graphite)
• Include business platform ID in bugsnag info #5136
• Report business platform ID instead of partner ID when relevant #5120
• main

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[github-actions]

We detected some changes at packages/*/src and there are no updates in the .changeset.
If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	75.35% (+0.02% 🔼)	8840/11732
🟡	Branches	70.61% (+0.02% 🔼)	4290/6076
🟡	Functions	75.2%	2314/3077
🟡	Lines	75.88% (+0.02% 🔼)	8357/11013

Test suite run success

1994 tests passing in 900 suites.

Report generated by 🧪jest coverage report action from e746586

[github-actions]

Differences in type declarations

We detected differences in the type declarations generated by Typescript for this branch compared to the baseline ('main' branch). Please, review them to ensure they are backward-compatible. Here are some important things to keep in mind:

• Some seemingly private modules might be re-exported through public modules.
• If the branch is behind main you might see odd diffs, rebase main into this branch.

New type declarations

We found no new type declarations in this PR

Existing type declarations

packages/cli-kit/dist/public/node/monorail.d.ts

@@ -16,6 +16,7 @@ export interface Schemas {
             env_plugin_installed_all?: Optional<string>;
         };
         public: {
+            business_platform_id?: Optional<number>;
             partner_id?: Optional<number>;
             command: string;
             project_type?: Optional<string>;

packages/cli-kit/dist/public/node/plugins.d.ts

@@ -16,7 +16,7 @@ import { Config, Interfaces } from '@oclif/core';
  * @returns A dictionary of plug-in names to the response from the hook.
  */
 export declare function fanoutHooks<TPluginMap extends HookReturnsPerPlugin, TEvent extends string & keyof TPluginMap>(config: Interfaces.Config, event: TEvent, options: TPluginMap[typeof event]['options'], timeout?: number): Promise<Partial<TPluginMap[typeof event]['pluginReturns']>>;
-type AppSpecificMonorailFields = PickByPrefix<MonorailEventPublic, 'app_', 'project_type' | 'api_key' | 'partner_id'> & PickByPrefix<MonorailEventPublic, 'cmd_extensions_'> & PickByPrefix<MonorailEventPublic, 'cmd_scaffold_'>;
+type AppSpecificMonorailFields = PickByPrefix<MonorailEventPublic, 'app_', 'project_type' | 'api_key' | 'partner_id' | 'business_platform_id'> & PickByPrefix<MonorailEventPublic, 'cmd_extensions_'> & PickByPrefix<MonorailEventPublic, 'cmd_scaffold_'>;
 type AppSpecificSensitiveMonorailFields = PickByPrefix<MonorailEventSensitive, 'app_'>;
 export interface HookReturnsPerPlugin extends HookReturnPerTunnelPlugin {
     public_command_metadata: {