Enable flexible temporal resolution (year, month, day)

CHANGES.md

@@ -8,6 +8,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+* **Flexible temporal resolution**: Support for `"year"`, `"month"`, and `"day"` resolutions via `temporal_resolution` config
+  - Monthly resolution enables seasonal modeling (e.g., renewable intermittency, water scarcity)
+  - Daily resolution for fine-grained operations and storage optimization
+  - Automatic conversion between resolutions (yearly→monthly→daily)
+* **Mixed temporal resolutions**: Processes can use different resolutions in the same model
+  - `detect_temporal_resolution()` infers resolution from TemporalDistribution values
+  - Coarser resolutions automatically expanded to match configured resolution
+* **User-provided characterization factors**: New `characterization_factors` field for custom time-varying LCIA
+  - Maps `(flow_code, time_index)` tuples directly to characterization factor values
+  - No Brightway method required - full flexibility for seasonal/regionalized factors
+  - Example: seasonal water scarcity factors varying by month
 * **Vintage-dependent foreground parameters**: Model how process characteristics change based on installation year (vintage). Supports two approaches:
   - Explicit values per vintage via `foreground_*_vintages` fields
   - Scaling factors via `technology_evolution` field

docs/content/examples/index.md

@@ -28,6 +28,18 @@ Here are some examples on how you can use the `optimex` package.
 
     *by @TimoDiepers & @JanTautorus*
 
+-   :lucide-sun:{ style="color: #ffd43b" } **Monthly Resolution Example**
+
+    ---
+
+    Seasonal renewable electricity with monthly temporal resolution. Demonstrates user-provided time-varying characterization factors for water scarcity.
+
+    [:lucide-arrow-right: View Example](./monthly_resolution_example.ipynb)
+
+    ---
+
+    *Monthly resolution & dynamic characterization*
+
 -   :lucide-hourglass:{ style="color: #ffa94d" } **More Examples coming soon...**
 
     ---