Merge main into dev: bring dev up to date with restructured package

Resolves add/add conflicts in .gitignore, config.yaml, pyproject.toml and
content conflict in README.md — taking main's version in all cases, as it
reflects the complete package rewrite (gallery/ package, TUI, CI pipeline).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config.yaml

@@ -5,24 +5,18 @@
 paths:
   # Working directory where the script runs from
   work_dir: "/work/kschmidt/web"
-  
+
   # Web hosting directory where gallery files are served
   web_folder: "/web/kschmidt/public_html/"
-  
-  # CGI script path (relative to web folder)
-  cgi_script: "cgi-bin/refresh_gallery.py"
-  
-  # Config file path for CGI scripts
-  config_path: "/work/kschmidt/web"
 
 # Gallery Settings
 gallery:
   # Root folder name for plots in web directory
   plot_root: "gallery"
-  
+
   # PNG conversion quality
   png_dpi: 400
-  
+
   # Backup folder (leave empty to disable)
   backup_folder: ""
 
@@ -30,7 +24,7 @@ gallery:
 ui:
   # Maximum number of recent plots to track
   max_recent_plots: 20
-  
+
   # Search settings
   search_debounce_ms: 300
 
@@ -38,14 +32,18 @@ ui:
 metadata:
   # Enable metadata caching
   cache_enabled: true
-  
+
   # Inherit metadata from parent folders
   inherit_from_parent: true
 
 # Data Sources
 # Each source represents a collection of plots to include in the gallery
-sources: 
+sources:
   - name: "ttbar_analysis"
     path: "/work/kschmidt/NEEDLE/test_analysis/data/cf_store/test_analysis/cf.PlotVariables1D/run2_2016_nano_v9/"
   - name: "needle_benchmarks"
     path: "/work/kschmidt/NEEDLE/orchestrator/ml/benchmarks/plots"
+  - name: "needle_fair_universe"
+    path: "/work/kschmidt/NEEDLE/orchestrator/runs/fair_universe_demo_fixed_normalization/stat_only_histogram_mu_one/plots"
+  - name: "aido_convergence_study"
+    path: "/work/kschmidt/aido/results_convergence/plots/"