equalize memory req=lim across 70+ containers using Prometheus 7d max data

After node2 OOM incident, right-size memory across the cluster by setting
requests=limits based on max_over_time(container_memory_working_set_bytes[7d])
with 1.3x headroom. Eliminates ~37Gi overcommit gap.

Categories:
- Safe equalization (50 containers): set req=lim where max7d well within target
- Limit increases (8 containers): raise limits for services spiking above current
- No Prometheus data (12 containers): conservatively set lim=req
- Exception: nextcloud keeps req=256Mi/lim=8Gi due to Apache memory spikes

Also increased dbaas namespace quota from 12Gi to 16Gi to accommodate mysql
4Gi limits across 3 replicas.

stacks/freedify/factory/main.tf

@@ -33,7 +33,7 @@ variable "gemini_api_key" {
 }
 variable "memory_limit" {
   type    = string
-  default = "256Mi"
+  default = "128Mi"
 }
 variable "cpu_request" {
   type    = string
@@ -41,7 +41,7 @@ variable "cpu_request" {
 }
 variable "memory_request" {
   type    = string
-  default = "64Mi"
+  default = "128Mi"
 }
 variable "extra_annotations" {
   type    = map(string)