[JarryShaw]

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• Followed the coding style (make pylint, make mypy, make isort)

• make test passes, and a test case covers the change. Narrow runs only, listed below.

• Added a changelog entry under docs/source/changelog/ and regenerated CHANGELOG.md, if the change is user-visible: N/A — centralised in docs(changelog): shared 1.5.0 changelog — long-lived, merges last (#610, #616, #617, #618, #620) #657

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Summary

#1103 round 2: the files phase 1 left unread, plus the phase-1 reviewers' follow-ups.

• add 24 entries for user-visible PRs merged before fix(ipv6-opts): RPL option 0x23 raises AttributeError in _read_opt_unassigned #1196 that nothing
  cited: corekit, protocols, utilities and vendor fixes, NGAP's generated
  registries, FEATCode case folding and the package all repairs
• cite fix(http): reach _guess_version's HTTP/2 arm, and resolve PayloadField names #789 and fix(foundation): name the base class the registrar guard actually checks #1020 on the entries already describing them, and merge
  the FieldBase.unpack pads a short read with rjust regardless of byte order, silently corrupting little-endian values #604 test-only entry that appeared twice
• the const(apptype): per-registry __canonical__ divergence makes get(port, proto=<multi-bit>) return a different service #759, fix(reg): emit tcpdump legacy link-type names after current ones #848 and protocols: implement NGAP over SCTP, decoding aligned PER through pycrate #417 entries give the release state: the
  TransportProtocol base, the value-aware legacy-sink rule, pycrate in all
• TLSKeyLabel's home is const.pcapng.tls_key_label, EnumRegistry's is
  corekit.enum, and the FieldBase.unpack pads a short read with rjust regardless of byte order, silently corrupting little-endian values #604 entry names main rather than mainline
• the config entry lists the pypcapfile limit and calls the moved homes
  prerelease names; a | between TransportProtocol members gives an int
• paraphrase six quoted owner rulings; drop "until now" and "this PR"
• date 1.5.0b1 to b3 in UTC, re-measure the preamble's 669 citations, and
  give the index's 19 bare issue numbers their roles
• regenerate CHANGELOG.md and re-pin process.rst to 292 entries

Refs #1103

[JarryShaw]

Verdict: GOOD TO GO at 214423212. Sonnet review and re-check (author: Opus). The first review blocked: an entry described the mh.py get overrides, which #940 deleted. Reworded, and CHANGELOG.md regenerated; the process.rst pin matches the measured entry count. The AST guard is identical against the base, tests/project passes, and every added directive says 1.5.0.