releaseparser: adopt fixed positional model, auto-detect catalogues, add GB doc-blocks

Parse releases with an explicit fixed positional model and document the
whole logic in British English doc-blocks.

Model:
- [0]=Artist, [1]=Title are fixed and never matched against dictionaries,
  so titles like "Split"/"Demo"/"De" are never eaten.
- [len-1]=Group is always read from the line, not from the query key.
- [len-2]=Year when it is a 4-digit 19xx|20xx token; otherwise the slot is
  resolved as a middle-zone token (e.g. FLAC still picked up as format).
- The middle zone is resolved via case-insensitive dictionaries in the order
  format -> source -> bit-depth -> resolution -> edition -> language ->
  catalogue number. Position within the zone is irrelevant.

Catalogue numbers:
- Any "(...)" token in the middle zone is a catalogue number regardless of
  content (digits, roman numerals, dots, underscores, mixed case). Removed
  the hasDigit requirement and character whitelist that rejected real
  catalogues like (DYN.3140-2) and (GOWP_DCCCLXXXIX).
- Splitting never breaks tokens inside parentheses.

Case handling: lookups are case-insensitive; stored values keep their
original case from the line.

Documentation: replaced Ukrainian comments in parser.go and analyzer.go with
British-English doc-blocks describing the model, tail resolution order,
catalogue rule and confidence scoring.

Tests:
- Add TestParseCatalogNumberWithDotAndRoman for (DYN.3140-2)/(GOWP_DCCCLXXXIX).
- Update case-insensitive, split-title, no-year and language expectations.
- go build, go vet and go test all pass.

internal/releaseparser/groups/moonblood/dicts/edition.txt

@@ -17,4 +17,41 @@ LIMITED_EDITION_BOXSET
 REMASTERED_EP
 10TH_ANNIVERSARY_EDITION
 OST
+XX_Legacy_Edition
 REISSUE_DEMO
+JP_Deluxe_Edition
+Remastered_Edition
+Anniversary_Edition
+Limited_Edition
+CDS
+CDM
+RETAIL
+JP_RETAIL
+JP_REISSUE
+DEMO_REMASTERED
+EU_RETAIL
+DE_RETAIL
+REISSUE_DELUXE_EDITION
+RETAIL_REISSUE
+SPECIAL_EDITION
+SPECIAL_COLLECTORS_EDITION_REMASTERED
+30_YEARS_SPECIAL_COLLECTORS_EDITION_REMASTERED
+LIMITED_EDITION_REMASTERED
+DEMO_REISSUE
+REMASTERED_REISSUE
+PROMO_DEMO
+REISSUE_EP
+MAG
+REISSUE_BOXSET
+30TH_ANNIVERSARY_EDITION_REMASTERED
+Deluxe_Edition_Reissue
+INSTRUMENTAL
+REISSUE_EXPANDED_EDITION
+BOOTLEG
+EXPANDED_EDITION
+ADVANCE
+15TH_ANNIVERSARY_DELUXE_EDITION
+TOUR_EDITION
+REMASTERED_DEMO
+REMASTERED_DELUXE_EDITION
+30TH_ANNIVERSARY_EDITION