fix(snowflake): handle DollarString in PUT/FROM and UUID paths in stage references

[mesmacosta]

Summary

Fixes 10 SQL parse failures from the Snowflake JDBC driver (v4.0.2) test suite by adding support for dollar-quoted strings in PUT/FROM statements and UUID-style path segments in stage references.

Changes

1. DollarString support in PUT statements

The JDBC driver wraps stage references with special characters in $$...$$ (dollar-quoted strings):

put file:///tmp/placeholder $$@%"ice cream (nice)"$$ overwrite=true

Fix:

• PUT source path loop now stops at DollarString token boundary
• PUT target parser accepts DollarString as a valid stage reference (alongside String and Parameter)

2. DollarString support in FROM clause

The JDBC driver uses dollar-quoted stage paths in SELECT FROM:

SELECT $1 FROM $$@%"ice cream (nice)"/$$

Fix: The FROM-clause table parser now accepts DollarString as a valid table source, similar to how it already accepts String for DuckDB.

3. UUID-style path segments in stage references

JDBC-generated PUT statements use UUID-based paths for upload operations:

-- User stage with UUID path
PUT file:///tmp/f @~/00626646-bb1e-4729-a1ab-d4b96aebbed5/testUploadStream overwrite=true

-- Named stage with UUID subpath
PUT file:///tmp/f.csv @teststage/c8b31cea-a6d1-4413-936d-bf8c9d63ab9f AUTO_COMPRESS=FALSE

Root cause: UUIDs tokenize as Number + Dash + Identifier + Dash etc. The path consumption loops in parse_stage_reference_as_string only accepted Var, keywords, and identifiers.

Fix:

• Added Number and Dash to accepted token types in all 3 path-segment loops (user stage @~, named stage @name, and Var-style @var)
• Changed path segment consumption from single-token (if) to multi-token (while) loops to handle composite UUID segments like c8b31cea-a6d1-4413

Test Results

• 33/33 regression tests pass (8 new + 25 existing)
• 997/997 main test suite tests pass (0 regressions)

Errors Resolved

Error ID	SQL Pattern	Root Cause
[6737]	PUT ... $$@%"ice cream"$$ ...	DollarString not accepted as PUT target
[6740]	SELECT $1 FROM $$@%"..."$$	DollarString not accepted in FROM
[7635]	PUT ... @~/UUID/testUpload ...	UUID path segments in @~
[7650]	PUT ... @~/UUID/testCompress ...	UUID path segments in @~
[14457]	PUT ... @~/UUID/testUpload ...	UUID path segments in @~
[6769]	PUT ... @stage/UUID AUTO_COMPRESS=FALSE	UUID subpath in named stage
[6772]	PUT ... @stage/UUID AUTO_COMPRESS=FALSE	UUID subpath in named stage
[6775]	PUT ... @stage/UUID AUTO_COMPRESS=TRUE	UUID subpath in named stage
[6778]	PUT ... @stage/UUID AUTO_COMPRESS=TRUE	UUID subpath in named stage

Related

• Closes Unable to parse a few queries from Java snowflake-jdbc tests #165 (partially — categories A-D)
• Related to Unable to parse a few queries from snowflake-connector-python tests #164 (original Python connector failures)
• Builds on PR fix(parser): resolve Snowflake Python connector SQL parsing failures #178 (categories 1-3 from Unable to parse a few queries from snowflake-connector-python tests #164)