refactor(examples): replace sector-specific example material with generic, fictitious examples

The context sets, the packaged knowledge bases and the example bundles are
replaced by one fictitious example set about IT operations in an invented
organisation: three context sets (serverrom-2027, driftsavtale-2027 and the
two-base drift-og-avtale-2027), two synthetic knowledge bases under
src/portfolio_optimiser/data/kunnskapsbaser and two example bundles under
src/portfolio_optimiser/data/bundles. Numbers, codes and structural values in
tests and fixtures are kept; names, ids and wording change. Dated measurement
documents that only recorded runs on the replaced material are deleted.

Gate figures measured on the new set are not comparable with earlier ones.
The exclusion gate from the previous commit is green: 0 tracked files hit
outside the shared/ subtree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_ungiven_verdict_loadbearing.py

@@ -235,7 +235,7 @@ def _make_docs(tmp_path: Path, name: str) -> str:
     d = tmp_path / name
     d.mkdir()
     (d / "cost.txt").write_text(
-        "Asphalt Ab11 unit rate renegotiation reduced the paving cost on the school stretch.",
+        "Licence unit price renegotiation reduced the office-suite cost for the head office.",
         encoding="utf-8",
     )
     return str(d)
@@ -243,9 +243,9 @@ def _make_docs(tmp_path: Path, name: str) -> str:
 
 def _road_k(tmp_path: Path, *, verdict_input: dict[str, str] | None) -> Project:
     return Project(
-        id="ROAD-K",
-        name="Road k",
-        description="road-backed project k",
+        id="REF-K",
+        name="Reference k",
+        description="reference-backed project k",
         currency="NOK",
         cost_items=(),
         docs_dir=_make_docs(tmp_path, "k-docs"),