Pre-publish privacy audit: scrub the simulator serial, harden the sdist, add licences

Audited the package against the two-stage procedure before a first PyPI
publish. The sdist and wheel were already tight, but three things needed
fixing and the controls needed to become real rather than documented.

The simulator volunteered high="PI04" as its product serial, which is the
real Bebop 2 serial prefix. Nothing unique to one aircraft, but a realistic
prefix invites being quoted into a bug report as a specimen, so it now reads
"N0TAREAL" / "0000000SIM" with a comment saying why it is nonsense on
purpose. The low half and the 500.0 no-fix GPS sentinel were already fake.

Hardened [tool.uv.build-backend] source-exclude well past the directories
that exist today: captures at any depth, log dumps, recorded media by
extension, caches, and anything credential-shaped. .gitignore governs git
and source-exclude governs the sdist; a capture can sit in one and not the
other, which is how this kind of data reaches an immutable index. Verified
the broad patterns do not over-reach: arsdk-xml/ with PROVENANCE.md and
tools/logs.py both still ship.

Added LICENSE (MIT) and LICENSE-arsdk-xml (Parrot SA's BSD-3-Clause), and
corrected the declared licence to "MIT AND BSD-3-Clause". The vendored XML
ships in both artifacts because nothing here decodes a command without it,
so MIT alone understated what is in the box. Both texts now appear in the
artifacts and in the metadata.

test_packaging.py grows privacy guards that fail on a serial prefix, a P7
CPU id, any MAC, a high-precision coordinate, an absolute home path, or any
private address other than the drone's own documented 192.168.42.0/24. Each
pattern was checked against the real identifiers to confirm it bites, since
a guard that passes on an empty tree proves nothing.

Example address in test_arsdk_session.py moved to RFC 5737 space.

504 tests pass, ruff clean.

LICENSE

@@ -0,0 +1,32 @@
+MIT License
+
+Copyright (c) 2026 Ryan Malloy
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
+
+This package also distributes a vendored third-party component under a
+different licence. See LICENSE-arsdk-xml for the full text.
+
+    src/mcbebop/arsdk-xml/common.xml
+    src/mcbebop/arsdk-xml/ardrone3.xml
+        Copyright (C) 2014 Parrot SA, BSD-3-Clause.
+
+The combined distribution is therefore "MIT AND BSD-3-Clause".