docs(fakebus): clarify single-connection model for intent-topic bridge

[JarbasAl]

🤖 Auto-generated by Claude Fable 5 (claude-fable-5) via Claude Code — NOT human-reviewed. Verify before acting.

A downstream team recently re-derived FakeBus's intent-pair dedup guard as a bug: they attached a second listener to the same FakeBus instance to observe both the legacy and canonical spellings of an intent topic, and only ever saw one delivery. That is correct behavior — a FakeBus models one bus connection, and one real MessageBusClient connection only delivers one spelling too. But nothing in the docstring said so, and the guard-scope explanation right next to it is dense enough that the single-connection assumption is easy to miss.

This PR only adds a short plain-English paragraph to the _bridge_intent_topic docstring in ovos_utils/fakebus.py, explaining what FakeBus can and cannot represent (one connection, not multiple), and pointing test observers at the canonical topic. No behavior changes; test/unittests/test_fakebus_intent_topic_bridge.py (12 tests) still passes.

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• ovos_utils/fakebus.py

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ovos_utils/__init__.py	63.6%	16
ovos_utils/file_utils.py	74.4%	56
ovos_utils/thread_utils.py	76.9%	12
ovos_utils/geolocation.py	78.4%	22

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Signal	Value
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PR title	docs(fakebus): clarify single-connection model for intent-topic bridge
Bump	alpha

⚠️ No conventional commit prefix — alpha-only bump.
Suggested: fix: update the thing or feat: update the thing

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🚀 Release Channel Compatibility

Predicted next version: 0.13.10a2

Channel	Status	Note	Current Constraint
Stable	❌	Too new (must be <0.9.0)	ovos-utils>=0.8.1,<0.9.0
Testing	❌	Too new (must be <0.8.5)	ovos-utils>=0.8.4,<0.8.5
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