feat(web-app-peertube): add dynamic performance tuning for heap and transcoding concurrency

- Dynamically calculate PEERTUBE_MAX_OLD_SPACE_SIZE (~35% of container RAM, clamped between 768–3072 MB)
- Dynamically calculate PEERTUBE_TRANSCODING_CONCURRENCY (~½ vCPUs, min 1, max 8)
- Added default resource limits for Redis and Peertube containers
- Updated test suite to include human_to_bytes filter in built-in filter list

https://chatgpt.com/share/690914d2-6100-800f-a850-94e6d226e7c9

tests/integration/test_filters_are_defined.py

@@ -37,7 +37,7 @@ BUILTIN_FILTERS: Set[str] = {
     "type_debug", "json_query", "mandatory", "hash", "checksum",
     "lower", "upper", "capitalize", "unique", "dict2items", "items2dict", 
     "password_hash", "path_join", "product", "quote", "split", "ternary", "to_nice_yaml", 
-    "tojson", "to_nice_json",
+    "tojson", "to_nice_json", "human_to_bytes",
 
 
     # Date/time-ish