InfluxData docs-v2 added a parse/compile lint check for fenced code
blocks. JSON, YAML, and TOML blocks that fail to parse block CI on
the docs site. The plugin READMEs in this repo are mirrored verbatim
into docs-v2 by the sync process, so several blocks that were never
valid JSON or TOML now break the docs build downstream.

These fixes preserve the original intent and content where possible.
Where a block is genuinely illustrative (placeholders, ellipses, mixed
HTTP-method-line plus body, vendor query languages) the fence is
relabeled to the closer-fit language so the lint check skips it.

TOML fixes (6 files):
  - inputs/jti_openconfig_telemetry: `sensors = [...]` was redefined
    twice; commented out the alternative-form example.
  - inputs/opcua_listener: `// ... default values ...` C-style
    comments inside an inline-table list. TOML uses `#` for comments;
    converted to trailing `#` comments.
  - inputs/postgresql_extensible: `sqlquery = "...where \` line
    continuations in basic strings are invalid TOML. Switched to
    multi-line basic strings (`"""..."""`) which preserve the `\`
    line-end continuation form for readability and parse cleanly per
    the TOML 1.0 spec (`mlBasicBody <- ... / escape newline wsnl` in
    influxdata/toml's parse.peg).
  - inputs/win_eventlog: `xpath_query = '''` opened a TOML literal
    multi-line string but never closed; the surrounding text says
    "set xpath_query empty" — replaced with `""`.
  - outputs/dynatrace: `api_token = "..." // hard-coded ...` —
    converted `//` to `#`.
  - processors/converter: `timestamp_format = "unix` missing close
    quote.

JSON fixes (8 files):
  - inputs/bind: BIND nameserver config (`statistics-channels { ... };`)
    was tagged `json`. Relabeled `text`.
  - inputs/ctrlx_datalayer (3 blocks): `"key" : value` lines (the OPC
    UA server's address-value rendering) are not JSON. Relabeled `text`.
  - inputs/docker (2 blocks): `docker_label_exclude = [...]` and
    `docker_label_include = [...]` are TOML config snippets, not JSON.
    Relabeled `toml`.
  - outputs/azure_data_explorer: KQL function definition (`.create-or-
    alter function ... { ... }`) tagged `json`. Relabeled `kusto`.
  - outputs/clarify: `"signal" { ... }` and `"values" { ... }` are
    Clarify's representation, not JSON. Relabeled `text`.
  - outputs/elasticsearch (2 blocks): `PUT /_cluster/settings` and
    `POST https://...` are HTTP request lines mixed with a JSON body.
    Relabeled `text`.
  - outputs/zabbix (2 blocks): line-delimited multiple JSON objects.
    Relabeled `jsonl`.
  - processors/lookup: illustrative template with `...` ellipsis
    relabeled `text`; the actual data block had a trailing comma
    that was removed.

No code or behavior changes — README content only.