Improve performance oprimizing queries (#56)

* Extend test coverage

* Implement query optimization

* More aggressing code reuse

* Add more indexes and optimize usage

* Fix tests

* Further optimizations, improve counting to rely on backend DB

* chore: add Makefile for frontend asset minification

- Add comprehensive Makefile with targets for JS and CSS minification
- Implements instructions from ram/portal/static/js/src/README.md
- Provides targets: install, minify, minify-js, minify-css, clean, watch
- Fix main.min.js to only include theme_selector.js and tabs_selector.js
- Remove validators.js from minified output per README instructions

* Add a Makefile to compile JS and CSS

* docs: add blank line whitespace rule to AGENTS.md

Specify that blank lines must not contain any whitespace (spaces or tabs) to maintain code cleanliness and PEP 8 compliance

* Update for 0.20 release with optimizations

* Improve Makefile

ram/roster/migrations/0041_rollingclass_roster_rc_company_idx_and_more.py

@@ -0,0 +1,65 @@
+# Generated by Django 6.0.1 on 2026-01-18 13:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        (
+            "metadata",
+            "0027_company_company_slug_idx_company_company_country_idx_and_more",
+        ),
+        ("roster", "0040_alter_rollingstock_decoder_interface_order"),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name="rollingclass",
+            index=models.Index(fields=["company"], name="roster_rc_company_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="rollingclass",
+            index=models.Index(fields=["type"], name="roster_rc_type_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="rollingclass",
+            index=models.Index(
+                fields=["company", "identifier"], name="roster_rc_co_ident_idx"
+            ),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(fields=["published"], name="roster_published_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(fields=["featured"], name="roster_featured_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(
+                fields=["item_number_slug"], name="roster_item_slug_idx"
+            ),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(fields=["road_number_int"], name="roster_road_num_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(
+                fields=["published", "featured"], name="roster_pub_feat_idx"
+            ),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(
+                fields=["manufacturer", "item_number_slug"], name="roster_mfr_item_idx"
+            ),
+        ),
+        migrations.AddIndex(
+            model_name="rollingstock",
+            index=models.Index(fields=["scale"], name="roster_scale_idx"),
+        ),
+    ]