feat(book-gig): add surrounding town mappings for Pembroke, Pulaski, Wirtz, and Huddleston

[JoshuaVSherman]

Summary

• Add Pembroke, Pulaski, Giles, Wirtz, Huddleston, and Moneta to METRO_SURROUNDING and KNOWN_METROS in src/book-gig/parser.ts.
• Expands surrounding-town discovery for Blacksburg/NRV and Roanoke/Salem so candidate venues in Giles County (Mountain Lake Lodge in Pembroke), Pulaski County (Rock House Marina in Claytor Lake/Pulaski), and Franklin County / Smith Mountain Lake (Brooks Mill Winery in Wirtz) are resolved in regional candidate sweeps.
• Bump version to 1.32.34 in deno.json.

Part of #484

How to test locally

• Automated unit test suite:
  • Run deno task test to verify all 1947 tests pass 100% green.
  • Run deno task fmt:check, deno task lint, and deno task sast.
• Behavioral verification of geographic candidate resolution:
  • Call parseLocation("Lynchburg, Blacksburg, Martinsville, Salem, Roanoke, and surrounding areas").
  • Verify candidate venues in Pembroke (24136), Pulaski (24301), and Wirtz (24184) are included in the resolved geographic perimeter.

Test evidence

Task fmt:check deno fmt --check src/ test/
Checked 202 files
Task lint deno lint src/ test/
Checked 166 files
Task sast bash scripts/sast.sh
Ran 214 rules on 63 files: 0 findings.
[sast] OK — no blocking findings.
ok | 1947 passed | 0 failed (59s)

🤖 Work by Antigravity — Gemini Flash (High)