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/metadata/migrations/0027_company_company_slug_idx_company_company_country_idx_and_more.py

@@ -0,0 +1,51 @@
+# Generated by Django 6.0.1 on 2026-01-18 13:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("metadata", "0026_alter_manufacturer_name_and_more"),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name="company",
+            index=models.Index(fields=["slug"], name="company_slug_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="company",
+            index=models.Index(fields=["country"], name="company_country_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="company",
+            index=models.Index(fields=["freelance"], name="company_freelance_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="manufacturer",
+            index=models.Index(fields=["category"], name="mfr_category_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="manufacturer",
+            index=models.Index(fields=["slug"], name="mfr_slug_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="manufacturer",
+            index=models.Index(fields=["category", "slug"], name="mfr_cat_slug_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="scale",
+            index=models.Index(fields=["slug"], name="scale_slug_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="scale",
+            index=models.Index(fields=["ratio_int"], name="scale_ratio_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="scale",
+            index=models.Index(
+                fields=["-ratio_int", "-tracks"], name="scale_ratio_tracks_idx"
+            ),
+        ),
+    ]

ram/metadata/models.py

@@ -48,10 +48,19 @@ class Manufacturer(SimpleBaseModel):
         ordering = ["category", "slug"]
         constraints = [
             models.UniqueConstraint(
-                fields=["name", "category"],
-                name="unique_name_category"
+                fields=["name", "category"], name="unique_name_category"
             )
         ]
+        indexes = [
+            # Index for category filtering
+            models.Index(fields=["category"], name="mfr_category_idx"),
+            # Index for slug lookups
+            models.Index(fields=["slug"], name="mfr_slug_idx"),
+            # Composite index for category+slug (already in ordering)
+            models.Index(
+                fields=["category", "slug"], name="mfr_cat_slug_idx"
+            ),
+        ]
 
     def __str__(self):
         return self.name
@@ -91,6 +100,14 @@ class Company(SimpleBaseModel):
     class Meta:
         verbose_name_plural = "Companies"
         ordering = ["slug"]
+        indexes = [
+            # Index for slug lookups (used frequently in URLs)
+            models.Index(fields=["slug"], name="company_slug_idx"),
+            # Index for country filtering
+            models.Index(fields=["country"], name="company_country_idx"),
+            # Index for freelance filtering
+            models.Index(fields=["freelance"], name="company_freelance_idx"),
+        ]
 
     def __str__(self):
         return self.name
@@ -165,6 +182,16 @@ class Scale(SimpleBaseModel):
 
     class Meta:
         ordering = ["-ratio_int", "-tracks", "scale"]
+        indexes = [
+            # Index for slug lookups
+            models.Index(fields=["slug"], name="scale_slug_idx"),
+            # Index for ratio_int ordering and filtering
+            models.Index(fields=["ratio_int"], name="scale_ratio_idx"),
+            # Composite index for common ordering pattern
+            models.Index(
+                fields=["-ratio_int", "-tracks"], name="scale_ratio_tracks_idx"
+            ),
+        ]
 
     def get_absolute_url(self):
         return reverse(