fix: eagerly load configuration.rb to fix WorkOS.configure

[gjtorikian]

Summary

• Adds configuration.rb to the list of hand-maintained files ignored by Zeitwerk and explicitly required
• Follows the same pattern already used for errors.rb and inflections.rb
• Zeitwerk only autoloads on constant access, not method calls — so WorkOS.configure was unavailable until something happened to reference WorkOS::Configuration first

Fixes #462

Test plan

• Confirm WorkOS.configure { |c| ... } works immediately after require 'workos' without needing an explicit require 'workos/configuration'

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR fixes a bug where WorkOS.configure was unavailable immediately after require 'workos' because Zeitwerk only autoloads constants on first access, not method calls. The fix adds configuration.rb to Zeitwerk's ignore list and eagerly requires it — mirroring the existing pattern for errors.rb and inflections.rb — and removes the now-unnecessary explicit require "workos/configuration" from the README initializer example.

Confidence Score: 5/5

Safe to merge — targeted, low-risk fix that follows an established pattern in the codebase.

The change is minimal (two lines in lib/workos.rb, one line removed from README), directly mirrors the existing pattern for errors.rb and inflections.rb, and correctly addresses the root cause of the Zeitwerk autoload timing issue.

No files require special attention.

Important Files Changed

Filename	Overview
lib/workos.rb	Adds loader.ignore + eager require for configuration.rb, consistent with existing errors.rb and inflections.rb pattern
README.md	Removes now-unnecessary explicit require "workos/configuration" from initializer example
.oagen-manifest.json	Timestamp-only update reflecting oagen regeneration — no substantive change

Sequence Diagram

sequenceDiagram
    participant App
    participant workos_rb as lib/workos.rb
    participant Zeitwerk
    participant configuration_rb as workos/configuration.rb

    Note over App,configuration_rb: Before fix
    App->>workos_rb: require "workos"
    workos_rb->>Zeitwerk: loader.setup
    App->>App: WorkOS.configure { ... }
    Note right of App: ❌ NoMethodError — configuration.rb not yet loaded

    Note over App,configuration_rb: After fix
    App->>workos_rb: require "workos"
    workos_rb->>Zeitwerk: loader.ignore(configuration.rb)
    workos_rb->>Zeitwerk: loader.setup
    workos_rb->>configuration_rb: require "workos/configuration" (eager)
    configuration_rb-->>workos_rb: WorkOS::Configuration + WorkOS.configure defined
    App->>App: WorkOS.configure { ... }
    Note right of App: ✅ Works immediately

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