README + .gitignore: one repo, two workloads

README: merged service table (stack + LLM), structure incl. old/ and
docs/LLM/, unified deploy note, merge note.
.gitignore: merged both files; !scripts/*.env exception for the LLM
tunables (paths and numbers, never credentials); .obsidian/,
__pycache__/, .venv/ from the vllmScripts side.

.gitignore

@@ -2,6 +2,8 @@
 .env
 *.env
 !.env.example
+# LLM fleet tunables (paths and numbers, never credentials)
+!scripts/*.env
 
 # pi subagent artifacts
 .pi-subagents/
@@ -9,6 +11,16 @@
 # Agent trash
 .AGENTTRASH/
 
+# Python
+__pycache__/
+*.pyc
+
+# Virtual environments
+.venv/
+
+# Obsidian editor state
+.obsidian/
+
 # Editor/OS noise
 *.swp
 .DS_Store