LinkedIn Company Page

- SECURITY: image download is hardened against SSRF (https-only, private/loopback/link-local IPs blocked, redirects disabled, size and content-type capped).
- When a requested image cannot be uploaded, the post now fails instead of silently publishing text-only.
- get_post_status no longer falsely reports a post as existing/published; it returns an honest unknown/unsupported status.
- SECURITY: redact_credentials masks all secrets (including client_secret) by key pattern; raw upload-register response bodies are no longer logged.

- Added bundled account selection template for self-contained provider packages
- Added account_selection manifest configuration for dynamic organization selection
- Added setup instructions HTML for OAuth configuration guide
- Providers can now be updated independently without backend changes

- Initial release
- Support for text posts up to 3000 characters
- Image attachment support
- Rich article link preview
- OAuth 2.0 authentication flow
- Token refresh capability
- Organization page posting