feat(clerk): Add CRUD endpoints to existing objects

[wobsoriano]

What kind of change does this PR introduce?

1. Adds INSERT, UPDATE, and DELETE support to Clerk FDW for supported endpoints
2. Adds single-item retrieval by ID support (ID pushdown)

What is the current behavior?

• Clerk FDW only supports SELECT. INSERT, UPDATE, and DELETE return errors or no-ops.
• Querying a specific resource by ID fetches all records and filters locally.

What is the new behavior?

• Full CRUD: users, organizations, jwt_templates, oauth_applications, saml_connections
• Insert + Delete: allowlist_identifiers, blocklist_identifiers, redirect_urls
• Insert only: invitations
• Update + Delete: domains
• ID Pushdown - users, organizations, jwt_templates, oauth_applications, saml_connections, redirect_urls

Additional context

• Follows Orb FDW patterns (structure) and Paddle FDW patterns (PATCH for updates)
• Documentation updated to reflect CRUD support and retrieve-by-ID notes

[Copilot]

Pull request overview

This PR adds CRUD (Create, Read, Update, Delete) functionality to the Clerk Foreign Data Wrapper, extending it beyond read-only SELECT operations to support data modification operations.

Key Changes:

• Implemented INSERT, UPDATE, and DELETE operations using HTTP POST, PATCH, and DELETE methods respectively
• Added rowid_column 'id' option to all table definitions to enable row identification for updates and deletes
• Updated documentation to reflect new CRUD capabilities for each supported object type

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
wasm-wrappers/fdw/clerk_fdw/src/lib.rs	Implements begin_modify, insert, update, and delete functions with HTTP request handling for various Clerk API endpoints; adds rowid_column option to all table definitions
docs/catalog/clerk.md	Updates operation support tables to show INSERT/UPDATE/DELETE capabilities per object type; adds data modification examples demonstrating CRUD operations

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