Revamp questionnaire, parallelize run-all, add new tasks

- Replace 6 compound Likert questions with 12 atomic ones grouped by
  dimension (syntax, expressiveness, data/IO, errors, overall); drop
  free-form question. Responses now stored as ints, not strings.
- Back-compat layer maps legacy keys to new dimensions so existing
  results still render.
- Parallelize run-all with ThreadPoolExecutor (configurable workers)
  and add a thread-safe min-request-interval rate limiter to the
  Anthropic provider.
- Add new tasks: path_normalizer, todo_manager, currency_converter,
  locale_weather_url, network_info_parser, url_normalizer.

tasks/pipeline/locale_weather_url.toml

@@ -0,0 +1,76 @@
+name = "locale_weather_url"
+category = "pipeline"
+mode = "convert"
+description = """
+Construct weather API URLs from locale and location information.
+Read lines from stdin in the format: LANG_CODE LOCATION
+where LANG_CODE is a 2-letter locale (e.g., "en", "fr", "de")
+and LOCATION is a city/place name (may contain spaces).
+
+For each line, construct a URL in the format:
+  https://LANG.wttr.in/LOCATION
+
+Where spaces in the location are replaced with "+" characters.
+
+If LANG_CODE is empty or invalid (not exactly 2 lowercase letters),
+default to "en".
+
+Skip empty lines. Output one URL per input line.
+"""
+
+bash_source = '''
+#!/bin/bash
+while IFS= read -r line || [[ -n "$line" ]]; do
+  [[ -z "$line" ]] && continue
+
+  # Extract lang code (first field)
+  lang=$(echo "$line" | awk '{print $1}')
+
+  # Extract location (everything after first field)
+  location=$(echo "$line" | sed 's/^[^ ]* *//')
+
+  # Validate lang code: must be exactly 2 lowercase letters
+  if [[ ! "$lang" =~ ^[a-z]{2}$ ]]; then
+    lang="en"
+  fi
+
+  # If location is same as lang (single-word line), skip
+  if [[ "$location" == "$lang" || -z "$location" ]]; then
+    location=""
+  fi
+
+  # Replace spaces with +
+  location=$(echo "$location" | tr ' ' '+')
+
+  echo "https://$lang.wttr.in/$location"
+done
+'''
+
+[[test_cases]]
+description = "Various locales and locations"
+stdin = """en New York
+fr Paris
+de Berlin
+ja Tokyo"""
+expected_stdout = """https://en.wttr.in/New+York
+https://fr.wttr.in/Paris
+https://de.wttr.in/Berlin
+https://ja.wttr.in/Tokyo"""
+
+[[test_cases]]
+description = "Multi-word locations"
+stdin = """en San Francisco
+es Buenos Aires
+pt Rio de Janeiro"""
+expected_stdout = """https://en.wttr.in/San+Francisco
+https://es.wttr.in/Buenos+Aires
+https://pt.wttr.in/Rio+de+Janeiro"""
+
+[[test_cases]]
+description = "Invalid or missing locale defaults to en"
+stdin = """ENG London
+123 Moscow
+x Rome"""
+expected_stdout = """https://en.wttr.in/London
+https://en.wttr.in/Moscow
+https://en.wttr.in/Rome"""