salesloft-upgrade-migration

# SalesLoft Upgrade & Migration ## Overview SalesLoft REST API is versioned at v2 with no official SDK -- migrations involve endpoint changes, auth flow updates, and response schema changes. The Cadence Import/Export API was a major addition. Key migration: SalesLoft rebranded some endpoints and added OAuth client credentials flow. ## Migration Scenarios ### Legacy API Key to OAuth 2.0 ```typescript // BEFORE: Static API key (being deprecated for partner apps) const api = axios.create({ headers: { Authorization: `Bearer ${process.env.SALESLOFT_API_KEY}` }, }); // AFTER: OAuth 2.0 with token refresh class SalesloftOAuthClient { private tokenStore: { access: string; refresh: string; expiresAt: number }; async getClient() { if (Date.now() > this.tokenStore.expiresAt * 1000 - 300_000) { await this.refreshToken(); } return axios.create({ baseURL: 'https://api.salesloft.com/v2', headers: { Authorization: `Bearer ${this.tokenStore.access}` }, }); } private async refreshToken() { const { data } = await axios.post('https://accounts.salesloft.com/oauth/token', { grant_type: 'refresh_token', refresh_token: this.tokenStore.refresh, client_id: process.env.SALESLOFT_CLIENT_ID, client_secret: process.env.SALESLOFT_CLIENT_SECRET, }); this.tokenStore = { access: data.access_token, refresh: data.refresh_token, expiresAt: Math.floor(Date.now() / 1000) + data.expires_in, }; } } ``` ##...