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/models.py

@@ -11,7 +11,7 @@ from tinymce import models as tinymce
 
 from ram.models import BaseModel, Image, PropertyInstance
 from ram.utils import DeduplicatedStorage, slugify
-from ram.managers import PublicManager
+from ram.managers import RollingStockManager
 from metadata.models import (
     Scale,
     Manufacturer,
@@ -38,6 +38,14 @@ class RollingClass(models.Model):
         ordering = ["company", "identifier"]
         verbose_name = "Class"
         verbose_name_plural = "Classes"
+        indexes = [
+            models.Index(fields=["company"], name="roster_rc_company_idx"),
+            models.Index(fields=["type"], name="roster_rc_type_idx"),
+            models.Index(
+                fields=["company", "identifier"],
+                name="roster_rc_co_ident_idx",  # Shortened to fit 30 char limit
+            ),
+        ]
 
     def __str__(self):
         return "{0} {1}".format(self.company, self.identifier)
@@ -120,9 +128,35 @@ class RollingStock(BaseModel):
         Tag, related_name="rolling_stock", blank=True
     )
 
+    objects = RollingStockManager()
+
     class Meta:
         ordering = ["rolling_class", "road_number_int"]
         verbose_name_plural = "Rolling stock"
+        indexes = [
+            # Index for published/featured filtering
+            models.Index(fields=["published"], name="roster_published_idx"),
+            models.Index(fields=["featured"], name="roster_featured_idx"),
+            # Index for item number searches
+            models.Index(
+                fields=["item_number_slug"], name="roster_item_slug_idx"
+            ),
+            # Index for road number searches and ordering
+            models.Index(
+                fields=["road_number_int"], name="roster_road_num_idx"
+            ),
+            # Composite index for common filtering patterns
+            models.Index(
+                fields=["published", "featured"], name="roster_pub_feat_idx"
+            ),
+            # Composite index for manufacturer+item_number lookups
+            models.Index(
+                fields=["manufacturer", "item_number_slug"],
+                name="roster_mfr_item_idx",
+            ),
+            # Index for scale filtering
+            models.Index(fields=["scale"], name="roster_scale_idx"),
+        ]
 
     def __str__(self):
         return "{0} {1}".format(self.rolling_class, self.road_number)
@@ -248,7 +282,7 @@ class RollingStockJournal(models.Model):
     class Meta:
         ordering = ["date", "rolling_stock"]
 
-    objects = PublicManager()
+    objects = RollingStockManager()
 
 
 # @receiver(models.signals.post_delete, sender=Cab)