fix: make regional time series discoverable

docs/CODEX_EXECUTION_LOG.md

@@ -8293,3 +8293,43 @@ Next:
 - Convert the two confirmed Postel-bos challenger errors into a complete,
   leakage-free hard-negative training sample, add independent empty controls,
   then train a new inactive candidate through the same fail-closed gate.
+
+## Sprint 200 - Operational time-series handoff (2026-07-15)
+
+Implemented:
+- Reproduced the `Geen tijdreeks beschikbaar` dead end in the deployed regional
+  map: Evolution retained the current-only GRB building snapshot even though
+  persisted population and forest series were available.
+- Built one temporal-series catalog for every end-user theme from ready
+  persisted datasets. Entering Evolution now retains a comparable theme or
+  automatically opens the first available series and its latest snapshot.
+- Theme cards now expose observation count and year range for real series.
+  Single-snapshot sources remain visible as `Alleen huidige toestand` but are
+  disabled for comparison instead of opening empty controls.
+- Kept every comparison behind the existing temporal API and PostGIS
+  `vector_features` aggregation. No browser-side metrics, inferred snapshots
+  or synthetic historical values were introduced.
+- Updated the top-level Detection documentation values while touching the
+  frontend handoff documentation so the active profile no longer shows an
+  older superseded benchmark.
+
+Validation evidence:
+- A live regional Statbel comparison for a Mol bbox returned 87,868.45
+  area-weighted inhabitants in 2021 and 91,497.15 in 2025: +3,628.70 or
+  +4.13%. The API correctly marked the result as an estimate and suppressed
+  unsupported object lineage.
+- Focused temporal/regional/frontend contract tests passed: 21 tests.
+- Full readiness passed 601 backend tests, backend compilation, 88 documented
+  API routes, one Alembic head, frontend typecheck/build and shell gates.
+
+Known limitation:
+- The complete regional project currently has real 2021-2025 population and
+  2013-2025 modern forest series. Buildings, water, roads and parcels each
+  have one current GRB snapshot at regional scope. The official 1778/1873/1969
+  historical building, forest, water and road series is persisted for Mol but
+  has not yet been partitioned and imported for all 28 municipalities.
+
+Next:
+- Generalize the audited historical-land-use operator to the approved regional
+  scope, partition source retrieval by municipality and provision the three
+  official editions without merging their methodology into current GRB.