chore(ruff[lint]): Adopt ruff's default rule set

why: ruff 0.16 ships a curated 413-rule default set as its recommended
baseline. An explicit `select` replaces that set rather than extending
it, so this project was running 351 rules and silently opting out of
the default set. `extend-select` layers the project's own linters on
top of the default set instead of in place of it.

what:
- Replace `select` with `extend-select`, same entries, one per line
- Note in the file why `select` stays unset
- Name the linter behind `FA100` instead of describing the rule

Enabled rules go from 351 to 565.
https://docs.astral.sh/ruff/linter/#rule-selection

Author: tony

pyproject.toml

@@ -151,7 +151,10 @@ files = [
 target-version = "py310"
 
 [tool.ruff.lint]
-select = [
+# `select` is deliberately unset: ruff 0.16 enables a curated default rule
+# set, and an explicit `select` would replace it rather than extend it.
+# `extend-select` layers this project's additional linters on top.
+extend-select = [
   "E", # pycodestyle
   "F", # pyflakes
   "I", # isort
@@ -168,7 +171,7 @@ select = [
   "PERF", # Perflint
   "RUF", # Ruff-specific rules
   "D", # pydocstyle
-  "FA100",  # future annotations
+  "FA100", # flake8-future-annotations
 ]
 ignore = [
   "COM812", # missing trailing comma, ruff format conflict