feat: notes-python CRUD example + runtime path/query forwarding

- invoke.go: forward sub-path and query string to function pods
- server.js v0.1.2: add _path, _query, _method to event
- server.py v0.1.1: add _path, _query, _method to event
- upload.go: bump runtime versions (nodejs20:v0.1.2, python3.11:v0.1.1)
- examples/notes-python: CRUD notes via sub-path routing
  - sql-runner: generic SQL executor for DDL jobs
  - notes: CRUD router (/add, /update, /delete)
  - notes-list: SELECT all notes
  - init.tf: create TABLE + INDEX on apply

examples/notes-python/variables.tf

@@ -0,0 +1,9 @@
+# 2025-06-05
+# variables.tf — входные переменные для notes-python примера.
+
+variable "pg_dsn" {
+  description = "PostgreSQL DSN для подключения к БД внутри кластера"
+  type        = string
+  default     = "postgres://sless:sless-pg-password@postgres.sless.svc.cluster.local:5432/sless?sslmode=disable"
+  sensitive   = true
+}