Docs refresh: merge the re-pointed v0.2.5 tag; document main since v0.2.5

Add permissively licensed OPEN ICM Polish publications pilot (#34)

studia_bas: Studia BAS policy articles (scoped from #19) (#44)

Add source: sejm_api_2011_2022 - remaining attributed Sejm speeches (#18)

Add source: sejm_committee_transcripts - full Sejm committee zapis coverage (terms 9-10) (#37)

Add CC BY-SA 4.0 Wiadomosci Statystyczne Polish articles (#35)

Add CC BY 4.0 Polish OpenStax academic textbooks (#23)

Add CC BY-SA 4.0 Open AGH Polish chemistry textbooks (#25)

Add plwiki user-talk pages (ns 3) - conversational Polish (#40)

Add plwiki talk pages (ns 1+5) - conversational Polish (#36)

Add CC BY-SA 3.0 Polish cultural-accessibility guides (#27)

Add Polish TED public-procurement notices (#32)

Add CC BY-SA 3.0 Polish media-literacy lessons (#26)

Add source: sejm_interpellations — 10th-term written Q&A (#24)

Add CC0 Polish Common Voice validated text (v26.0) (#22)

docs: v0.2.5 includes all 20 sources in the tagged tree

Add UZP public-procurement rulings (KIO/SO/SA/SN) (#39)

Add eight CC BY-SA 4.0 Polish academic books from ROCK (#33)

Contributor guidance: source findings log + PR/normalization requirements (#17)

Add source: sejm_api — contemporary parliamentary speeches (2023 onward) (#16)

feat(data): add samorzad.gov.pl institutional corpus (#13)

Complete v0.2.3 phrase-frequency report + register drifted sources + AGENTS.md (#10)

Add dataset growth plot by version

Release v0.2.3 with community HPLT contribution

Add source: govpl (gov.pl government press releases) (#9)

Credit source expansion contributor

Release v0.2.1 metadata schema update

Add European HPLT Polish web filtering workflow

Add v0.3 source license review and quality mix workflow

Add phrase frequency stats and HF card snippet for Polish DynaWord