Fix Semrush API integration and release workflows

[sionsmith]

Summary

• align Semrush API request/auth handling for Trends, Backlinks, Domain compare, Projects, Listing Management, and Map Rank Tracker
• harden cache keys and normalize Semrush CSV headers to stable JSON fields
• fix GitHub Actions auto-tag, locked CI checks, release asset builds, release notes, and Homebrew tap update
• update README command examples and add regression coverage

Verification

• cargo fmt --all -- --check
• cargo clippy --locked --all-targets -- -D warnings
• cargo test --locked --all-targets
• ruby -e 'require "yaml"; Dir[".github/workflows/*.yml"].each { |f| YAML.load_file(f); puts f }'\n- git diff --check\n\n## Notes\n- Cargo.lock is included because CI now runs with --locked and the package version is 0.1.1.\n- Untracked recordings/ and tapes/ assets were left out of this PR.