v0.25.0: pain phrases and campaign hubs

• Pain phrases on buyer-lead monitors (#225). Monitors search for the words people use when the problem hits them ("can't find communities"), before keywords. Matches score as problem posts, get +10 over the model's score, and list first. og buyers phrases <id> --generate, POST /buyer-leads/monitors/:id/phrases, MCP generate_buyer_lead_pain_phrases.
• Campaign hubs (#225, #226). og hubs <campaign> --refresh, GET|POST /api/v1/campaigns/:id/hubs, MCP campaign_hubs: the accounts a campaign's leads follow and reply to on Bluesky and Mastodon, plus X/LinkedIn leads to watch by hand. myna 0.49.0 imports them (myna outreachgraph hubs) and drafts replies that a person approves.
• Also ships #224 (outbound webhooks on @profullstack/webhooks, 0.24.0, previously untagged).
• Migration 0080.