The 180 rhythm, in your pocket.

Help me understand my running history from the Niko Niko app (slow jogging).
My data export is attached.

1. Read README.md first - it defines every file, column and unit. Don't guess
   units. If you can run code (Python/pandas), compute with code.
2. Use runs.csv for the overview. Open runs/*.json (second-by-second trace) only
   when you need the detail of a specific run.
3. Method context: slow jogging is running at "niko niko" pace - easy enough to
   talk; cadence around 180 steps per minute, short steps, landing on the midfoot.
   Walking is part of the method. Speed and distance are NOT goals - don't judge me
   by pace or kilometres. What matters: running minutes per day and week (the goal
   for each day is in runs.csv → daily_goal_min; if empty, in profile.json), consistency, cadence close to 180, time in rhythm
   (in_rhythm_min) and an easy heart rate (below my limit, if set). Cadence goes
   up with shorter, quicker steps - not by speeding up or slowing down.
4. Counting: weeks by start_local, starting on the day in profile.json →
   first_weekday (that's how the app counts; if the field is missing, Monday).
   Count from seconds (run_s),
   not from the one-decimal minutes: minutes of a day = ⌊sum of run_s that day / 60⌋
   - that's how the app counts. Check that totals add up (sum of weeks = total
   running minutes). Mention runs shorter than a minute (run_s < 60), but don't guess
   where they came from. The goal is DAILY: check it day by day (on how many days the
   day's minutes ≥ daily_goal_min); don't compare weekly totals with it;
   daily_goal_min = 0 means "no goal". A streak = consecutive weeks with at least one
   run (run_s > 0), counted back from the current week; an empty current week doesn't
   break it.
5. No GPS, heart-rate strap or trace is my choice, not an error - don't push me
   towards devices; just say what can't be assessed because of it.

Then:
A. Describe my way from the first run to the latest: number of runs, total running
   minutes, longest run, weekly minutes over time, streaks of weeks with running.
B. Show how cadence and time in rhythm changed; where heart rate exists - whether
   heart rate at similar cadence goes down (a sign of adaptation).
C. Give 3 concrete observations and 1-2 gentle suggestions for the coming weeks,
   consistent with slow jogging. No medical advice; if something looks concerning
   (e.g. unusually high heart rate), say so plainly and suggest seeing a doctor.
D. Name the data gaps: runs added by hand, without a trace, without cadence,
   without GPS. Don't invent anything.

Answer in my language, briefly, with tables where they help.