Remove anonymous users feature

[Copilot]

Console switched to a new start trial flow where anonymous users are no longer needed. This removes all anonymous user infrastructure across the stack.

Console API

• Remove /v1/anonymous-users routes and AuthTokenService
• Remove REGULAR_ANONYMOUS_USER role and ANONYMOUS_FREE_TRIAL feature flag
• Remove findAnonymousById from UserRepository
• Remove anonymous user handling from auth.interceptor.ts and managed-signer.service.ts
• Remove anonymousUserId from user registration flow
• Remove ANONYMOUS_USER_TOKEN_SECRET from env config

Deploy Web

• Remove AnonymousUserProvider, useAnonymousUserQuery, useStoredAnonymousUser
• Remove withAnonymousUserToken interceptor
• Remove anonymous_free_trial feature flag and all conditional UI logic
• Remove anonymous auth cookie handling from signup/callback
• Remove WelcomeToTrialModal component
• Simplify withUserToken to always use proxy

HTTP SDK

• Remove getOrCreateAnonymousUser, createAnonymousUser, getAnonymousUser from UserHttpService

Test Updates

• Remove anonymous user test cases and seeders
• Update component specs to remove feature flag mocking

Original prompt

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This section details on the original issue you should resolve

<issue_title>Remove anonymous users feature</issue_title>
<issue_description>## Why

console switched to a new start trial flow where anonymous users are not needed anymore

What

Remove all occurrences of anonymous users:

• creation on deploy-web (extra headers handling on signup via cookie)
• routes on console-api (cleanup user.service.ts)
• sdk methods/classes in http-sdk
• remove feature flag for ANONYMOUS_START_TRIAL on deployweb and in console-api</issue_description>

Comments on the Issue (you are @copilot in this section)

@stalniy @baktun14 does it sound good?

• Fixes Remove anonymous users feature #2230

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[stalniy]

close it, since it has too many conflicts