[REF] personalverrechnung: relocate Lexis360 raw layer to .lexis360/

Move the licensed PDF exports and the Layer-1 full texts from the
project root into the dot directory .lexis360/, keeping the root
listing to versioned content plus the tool checkouts.

The location also encodes provenance, distinct from .firecrawl/:
.lexis360/ holds user-supplied licensed exports that cannot be
re-fetched by an agent - if missing, stop and ask the user
(documented in MEMORY), whereas .firecrawl/ remains the home of
reconstructible web fetches.

- plain move of the unversioned directory (batch2/ subfolder spotted
  and left untouched for its own intake run)
- .gitignore, tool constants/messages, source.pdf/source.text
  frontmatter paths of all 55 curated entries, README/RUNBOOK/MEMORY
  mentions; kb.json/INDEX.md regenerated
- batch 2 (53 PDFs) recorded in MEMORY as staged in .lexis360/batch2/

Validated end to end: --extract 55/55 with stable ids, --registry
55 entries/6 clusters, --check 0 problems (every frontmatter path
resolves at the new location), no stale path references remain.

personalverrechnung/wissensbasis/dokumente/altersteilzeitgeld.md

@@ -8,8 +8,8 @@ topic: altersteilzeit
 author: "Marek"
 stand: 2026-01
 source:
-  pdf: "Lexis360/Lexis360_altersteilzeitgeld.pdf"
-  text: "Lexis360/md/altersteilzeitgeld.md"
+  pdf: ".lexis360/Lexis360_altersteilzeitgeld.pdf"
+  text: ".lexis360/md/altersteilzeitgeld.md"
 legal_bases: ["AlVG § 28", "Insolvenz-Entgeltsicherungsgesetz", "Bauarbeiter-Urlaubs- und -Abfertigungsgesetz"]
 tags: [altersteilzeitgeld, ams-foerderung, ersatzbare-zusatzkosten, differenzbeitragsgrundlage, sonderzahlungen, ruckforderung]
 cross_refs: ["lb-atz-01", "lb-atz-02", "lb-atz-04", "lb-atz-05", "lb-atz-07", "lb-atz-12", "lb-atz-15"]