- Remove internal dev build script (sync_yaml.py)
- Remove doc_files (internal screenshots from a non-public tenant and the
  demo-video planning note); pack ships without screenshots for now
- README + release notes: remove mentions of features that are not in the
  pack yet (Darkmon Setup Wizard, Threat Overview dashboard, Weekly Threat
  Intel Digest report) — those will arrive in a future minor version

- Drop the duplicate `camel_case_to_underscore` definition in
  Darkmon.py (CommonServerPython already exports it, so the local
  copy was triggering pylint E0102 and mypy [no-redef]). The unused
  `import re` follows automatically. Remove the matching unit test.
- Annotate previously-inferred empty containers: 9 x `headers_set =
  set()` -> `set[str]`, plus `type_groups` and `all_headers`.
- Coerce `arg_to_number(...)` callers in the two affected commands to
  fall back to a sane default (DEFAULT_SIZE / 1) so the result is a
  concrete `int`, not `int | None`. Likewise default `indicator_type`
  to `""` before passing it through; the Client still raises
  `Invalid indicator type` for empty/unknown values.
- Narrow `cr.outputs` to a dict before subscript/spread so mypy stops
  flagging the `object`-typed return.
- Replace test-only `builtins.DemistoException` / `builtins.demisto`
  references with `src.DemistoException` / `src.demisto`. These rely
  on the now-correct `from CommonServerPython import *` preamble and
  let the docker-hosted pytest hook run without our local conftest.
- README.md: add the blank line markdownlint MD032 requires between
  each `###` heading and the bullet list that follows.

Local pytest: 220 passing. Local ruff (format + repo's full select
list, line-length 130, py311): clean across all PR files.

The Domains/IP/etc. tables emitted by `dmontip-global-search` previously
fed every header through CommonServerPython's `string_to_table_header`,
which capitalises one word at a time and silently lower-cases acronyms
("WHOIS Registrar" -> "Whois Registrar"). The backend already returns a
pre-formatted `displayName` per cell, so the second transform was both
redundant and wrong.

- When `displayName` is present, use it verbatim as the column header.
- When only `accessorKey` is available, convert it once via
  `pascalToSpace` (CSP) so acronyms survive (e.g. `firstSeenIP` ->
  `First Seen IP`).
- Drop the `headerTransform=string_to_table_header` argument from
  `tableToMarkdown` so headers are no longer mangled a second time.

Fixes the pytest-in-docker failure on
`test_global_search_handles_brand_new_columns_without_code_changes`.