pub fn ler_env_compile_time() -> Option<Vec<String>>Expand description
Layer 4: reads keys embedded at compile time via option_env!("CONTEXT7_API_KEYS").
Allows embedding keys in the binary at build time:
CONTEXT7_API_KEYS=ctx7sk-a cargo build --release
Security warning: compile-time keys are visible to anyone who inspects
the binary (e.g. strings context7 | grep ctx7sk-). Use only in controlled
pipelines where access to the binary artefact is restricted.
Returns None if the variable was not defined at compile time.