Get post analytics timeline

Fetch an account's latest external posts (published directly on the platform, not through Zernio) on demand, so a newly published post is retrievable within seconds instead of waiting for the background sync (which refreshes each account at most every ~90 minutes). Primary use case: verifying a submitted post. When a user publishes on the platform and immediately pastes the post URL into your app, call this with `accountId` plus `url` (or `postId`) to confirm the post exists and return its metadata. Behavior: - Account access and connection state are checked before any platform call, including requests inside the debounce window. - Inactive accounts or accounts marked `needsReconnection` return `409` with code `ads_connection_required`. Stop scheduled retries for that account until it is reconnected, then read `GET /v1/accounts` for its current account ID. - For connected accounts, we fetch the latest posts live from the platform, then match and return the submitted post. - Requests are debounced per account (~15s): if the account was synced inside that window, the live fetch is skipped. `accountId` is required, because a post URL or id alone cannot be resolved to an account, and the account must be connected to Zernio (we use its token to read the platform). Supported for every platform with a listing API (Instagram, Facebook, TikTok, YouTube, X, Threads, Pinterest, Reddit, Bluesky, Google Business Profile, and LinkedIn organization accounts). LinkedIn personal profiles: LinkedIn has no listing API for personal profiles, so a `url` is REQUIRED and imports that single post. Pass any LinkedIn post URL (`linkedin.com/posts/…`, `linkedin.com/feed/update/urn:li:activity:…`) or a `urn:li:share:…` / `urn:li:ugcPost:…` URN. Works for posts published outside Zernio and before the account was connected, any age; the post must be authored by the connected member. Imported posts return full analytics (impressions, reach, reactions, comments, reshares, saves) and keep refreshing on the background analytics cycle, but carry no content/media (LinkedIn does not expose them for personal profiles). `url` accepts any format the platform uses (e.g. `instagram.com/p/…`, `instagram.com/reel/…`, `youtu.be/…`, `youtube.com/shorts/…`, `tiktok.com/@user/video/…`, `vm.tiktok.com` short links, `pinterest.com/pin/…` on any regional domain, and `pin.it` short links). Pass `postId` (the platform media/video/pin id) as an alternative locator. Note: post-level analytics (reach, impressions) still carry the platform's own delay (e.g. ~24h on Instagram). This endpoint confirms the post exists and returns its metadata plus basic engagement (likes, comments), not delayed insights.