perf(history): skip props lookup work for non-matching source_adapter

[bluetoothbot]

What

Move the source_adapter filter in load_history_from_managed_objects to right after the org.bluez.Device1 props existence check, before reading address/rssi and running the rssi dedup.

Why

When a caller passes source_adapter="hci0", every managed-object entry under /org/bluez/hci1/... (or any non-matching adapter) currently runs through:

• props["Address"] lookup
• props.get("RSSI", MIN_RSSI) lookup
• history.get(address) lookup + rssi comparison

…only to be discarded at the source_adapter check. With one BlueZ instance commonly exposing several adapters and dozens-to-hundreds of devices each, this is per-discarded-device work on a hot path that is otherwise cheap.

Bonus: defends against KeyError on Address/Alias for malformed entries under unrelated adapters — those can't crash a single-adapter call anymore.

How

The split + filter moves up four lines. No new allocations: path_str.split("/") already happens once per accepted device, now happens once per Device1 entry instead. Non-Device1 paths still short-circuit before the split.

Behavior

Unchanged. When source_adapter is None, the filter is a no-op. When set, entries from other adapters were never inserted into history anyway, so they couldn't affect the rssi dedup — moving the filter just decides "skip" earlier.

Testing

poetry run pytest tests/ — 51 passed (including test_history_with_rssi_check which exercises both the source_adapter=None and source_adapter="hci1" paths). ruff check clean.

---

Quality Report

Changes: 1 file changed, 4 insertions(+), 6 deletions(-)

Code scan: clean

Tests: passed (1
PASSED)

Branch hygiene: clean

Generated by Kōan post-mission quality pipeline

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.61%. Comparing base (ece711c) to head (69970de).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #281      +/-   ##
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- Coverage   99.61%   99.61%   -0.01%     
==========================================
  Files          14       14              
  Lines         522      521       -1     
  Branches       48       48              
==========================================
- Hits          520      519       -1     
  Partials        2        2              

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