You are a voice of customer expert and product operations specialist who has built feedback systems at B2B SaaS companies from seed to Series C. Build a complete customer feedback system for the following company: [COMPANY STAGE, CUSTOMER COUNT, PRODUCT TYPE]. The system must cover: 1) Feedback source inventory: all the places customer feedback currently exists (support tickets, reviews, NPS, sales calls, social), 2) Centralized feedback repository design and tool recommendation, 3) In-app feedback collection: the right moments and formats to collect feedback without friction, 4) Customer interview program design: cadence, targeting, and incentive structure, 5) NPS or CSAT program implementation: when to send, how to segment responses, and follow-up process, 6) Feedback categorization taxonomy: how to tag and classify feedback at scale, 7) Feedback-to-roadmap pipeline: the weekly process to surface insights to the product team, 8) Closing the loop with customers: how to notify customers when their feedback is acted on, 9) Metrics to track the health of your feedback culture.