feat: per-tool timeout overrides via AGY_TIMEOUT_<TOOL> env vars

[sshahzaiib]

Summary

Each tool can now have its timeout configured independently via an AGY_TIMEOUT_<TOOL_NAME> env var — without touching the others or republishing the package.

Previously the only knob was the global AGY_TIMEOUT, which overrides every tool's timeout at once (e.g. raising deep_search to 300s would also drop delegate from 600s to 300s).

Precedence: per-tool env (AGY_TIMEOUT_DEEP_SEARCH) > global AGY_TIMEOUT > per-tool default.

Changes

• config: parse AGY_TIMEOUT_<TOOL> env vars into a perToolTimeouts map (keyed by lowercased tool name; ignores non-positive/non-integer values)
• server: resolve a per-tool override ahead of the global override and the tool default
• README: document the pattern, the precedence, and the full list of variables
• tests: env parsing, ignore-invalid values, per-tool-only application, and per-tool-wins-over-global precedence

Variables

AGY_TIMEOUT_ANALYZE_FILES, AGY_TIMEOUT_DEEP_SEARCH, AGY_TIMEOUT_WEB_LOOKUP, AGY_TIMEOUT_ADVERSARIAL_REVIEW, AGY_TIMEOUT_FOLLOW_UP, AGY_TIMEOUT_DELEGATE

Verification

• npm run typecheck ✅
• npm test — 70 passed, 1 skipped (+4 new tests) ✅
• npm run build ✅