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_falsification_skill_loadbearing.py

@@ -136,8 +136,8 @@ def test_the_worked_example_round_trips_through_the_real_readers(tmp_path: Path)
         # between this repo and the commons-owned artefact rather than a defect on either side.
         # The example declares `state: unreadable, reason: block-sequence, items_seen: 2` for a
         # SPEC §5.1 block sequence; po widened its reader to that carrier because all four
-        # delivered knowledge bases write it and nothing else (measured 2026-09-12: n100 446/446,
-        # n200 1133/1133, n500 270/270, r761 2756/2756 = 4605/4605, 0 in flow form). `shared/` is a
+        # knowledge bases delivered at the time wrote it and nothing else (measured 2026-09-12:
+        # 446/446, 1133/1133, 270/270, 2756/2756 = 4605/4605, 0 in flow form). `shared/` is a
         # PULL-ONLY subtree, so the declaration cannot be corrected from here: closing this needs a
         # commons amendment, and the divergence is asserted rather than skipped so it cannot sit
         # unnoticed until someone reads the prose.