fix(countries): normalise postal_code_format alternative-separator (BM, TW)

[dr5hn]

The convention used by 11 multi-format countries (GB/GG/IM/JE/BH/IR/LB/NL/PY/SH and AU-territory mirrors) is to separate alternative postal code formats with the pipe character |. Two outliers used non-standard separators:

Country	Before	After
BM	@@ ## or @@ @@	@@ ##|@@ @@
TW	###/#####/######	###|#####|######

Pure-cosmetic. postal_code_regex is unchanged for both, and no postcode rows are touched — only the human-readable format hint normalises to the existing convention.

Why it matters: downstream postal-format parsers (e.g. csc-validator, the export tool's postcode preview) iterate format.split('|') to render alternatives. The non-pipe forms produce garbled previews.

[github-actions]

CSC Validation Report

PR Format

• ✅ Description provided
• ❌ Data source linked
• ❌ Issue linked (recommended for data changes)
• ✅ Justification / context provided

Labels applied: data:countries

Schema Validation (250 records)

Errors (blocking):

• ❌ contributions/countries/countries.json: Record 1 ("Afghanistan"): "id" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 1 ("Afghanistan"): "created_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 1 ("Afghanistan"): "updated_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 1 ("Afghanistan"): "flag" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 2 ("Aland Islands"): "id" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 2 ("Aland Islands"): "created_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 2 ("Aland Islands"): "updated_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 2 ("Aland Islands"): "flag" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 3 ("Albania"): "id" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 3 ("Albania"): "created_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 3 ("Albania"): "updated_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 3 ("Albania"): "flag" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 4 ("Algeria"): "id" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 4 ("Algeria"): "created_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 4 ("Algeria"): "updated_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 4 ("Algeria"): "flag" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 5 ("American Samoa"): "id" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 5 ("American Samoa"): "created_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 5 ("American Samoa"): "updated_at" must not be included (auto-managed)
• ❌ contributions/countries/countries.json: Record 5 ("American Samoa"): "flag" must not be included (auto-managed)
• ...and 980 more errors

Warnings:

• ⚠️ contributions/countries/countries.json: Record 1 ("Afghanistan"): unknown field "population"
• ⚠️ contributions/countries/countries.json: Record 1 ("Afghanistan"): unknown field "gdp"
• ⚠️ contributions/countries/countries.json: Record 1 ("Afghanistan"): unknown field "area_sq_km"
• ⚠️ contributions/countries/countries.json: Record 1 ("Afghanistan"): unknown field "postal_code_format"
• ⚠️ contributions/countries/countries.json: Record 1 ("Afghanistan"): unknown field "postal_code_regex"
• ⚠️ contributions/countries/countries.json: Record 2 ("Aland Islands"): unknown field "population"
• ⚠️ contributions/countries/countries.json: Record 2 ("Aland Islands"): unknown field "gdp"
• ⚠️ contributions/countries/countries.json: Record 2 ("Aland Islands"): unknown field "area_sq_km"
• ⚠️ contributions/countries/countries.json: Record 2 ("Aland Islands"): unknown field "postal_code_format"
• ⚠️ contributions/countries/countries.json: Record 2 ("Aland Islands"): unknown field "postal_code_regex"
• ...and 1240 more warnings

Duplicate Detection

• ⚠️ contributions/countries/countries.json: Record 1 ("Afghanistan") appears to be a duplicate of existing "Afghanistan" (id: 1, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 2 ("Aland Islands") appears to be a duplicate of existing "Aland Islands" (id: 2, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 3 ("Albania") appears to be a duplicate of existing "Albania" (id: 3, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 4 ("Algeria") appears to be a duplicate of existing "Algeria" (id: 4, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 5 ("American Samoa") appears to be a duplicate of existing "American Samoa" (id: 5, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 6 ("Andorra") appears to be a duplicate of existing "Andorra" (id: 6, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 7 ("Angola") appears to be a duplicate of existing "Angola" (id: 7, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 8 ("Anguilla") appears to be a duplicate of existing "Anguilla" (id: 8, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 9 ("Antarctica") appears to be a duplicate of existing "Antarctica" (id: 9, distance: 0.0km)
• ⚠️ contributions/countries/countries.json: Record 10 ("Antigua and Barbuda") appears to be a duplicate of existing "Antigua and Barbuda" (id: 10, distance: 0.0km)

---

❌ 1000 error(s), 1500 warning(s) | Status: Changes required

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