Alpha Vantage Income Batch

combine_inc_stmt.py batch-downloads annual income statements from Alpha Vantage for tickers listed in a text file and consolidates results into a single CSV.

Inputs: tickers file + API key. Outputs: combined_income_statements_<timestamp>.csv. Run: python combine_inc_stmt.py and follow prompts. Known limitations: strict rate limits; add backoff/retry and checkpointing for large lists. Safety: keep API keys out of the repo (env var or .env).