docs: Add star history chart and author LinkedIn links to README

Revert "docs: Add star history chart to README"

docs: Add star history chart to README

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Update README.md

docs: Update README formatting for Week 3-7 sections

feat: Add Week 7 - Agentic RAG with LangGraph and Telegram Bot

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Update README.md

Update README.md

updating readme

adding redis cache

Langfuse integration

Adding basic tests

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